Republican presidential candidate Donald Trump greets supporters before speaking at a campaign rally, Tuesday, Oct. 18, 2016, in Grand Junction, Colo. (AP Photo/ Brennan Linsley)

WASHINGTON - The Latest on the U.S. presidential campaign (all times EDT):

7:31 p.m.

Ivanka Trump says her father will honour the results of the election and if they show that he's lost the presidential race he will concede to Hillary Clinton.

Trump's eldest daughter said Wednesday at Fortune's Magazine's Most Powerful Women Summit that her "father will always do the right thing."

Donald Trump, set to debate Clinton in Las Vegas Wednesday night, has repeatedly claimed that the election is "rigged" and has made unfounded claims of widespread voter fraud.

At the first of three presidential debates, Trump said he would honour the election result. But he has since waffled on that stance.

Ivanka Trump suggested that the media was biased against her father's campaign.

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6:50 p.m.

Donald Trump's guest list for the third and final debate now includes Alaska Gov. Sarah Palin and a woman who has accused former President Bill Clinton of sexual harassment.

The GOP nominee's campaign confirms that the former vice-presidential candidate will be in the audience. Also in attendance will be Leslie Millwee, a former Arkansas local reporter who claimed in an interview this week with Breitbart News that she was sexually assaulted by Bill Clinton three times in the 1980s.

Also attending is the mother of a man who was killed in the attack on the U.S. compound in Benghazi and President Barack Obama's half-brother.

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6:07 p.m.

Tim Kaine is urging voters in swing states to take nothing for granted because "we are living in a season of surprises."

Kaine told audiences at rallies in Ohio and North Carolina Wednesday that plenty could change in the next 20 days before Election Day and said the Russian government is making an unprecedented effort to try and affect the race.

U.S. intelligence officials have blamed the Russian government for a series of email breaches intended to influence the presidential election. The Russians deny involvement.

___5:45 p.m.

Hillary Clinton's daughter Chelsea is offering to help hundreds of supporters at Arizona State University convince their friends, classmates and associates to vote for the former secretary of state.

The 38-year-old candidate's daughter highlighted her mother's negotiating skills, a trait Republican nominee Donald Trump has said he would bring to the presidency.

Chelsea Clinton got in a dig at Trump over comments he has made which some immigrants, racial minorities and women have found offensive.

She says: "There can be no common ground with bigotry. But we have to compromise where we can. I think we need that type of leadership."

Arizona is a typically Republican-leaning state where polls show the race between Clinton and Trump tightening. First lady Michelle Obama is scheduled to speak in Phoenix Thursday.

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3:35 p.m.

President Barack Obama is concerned about possible outbreaks of violence if Republican Donald Trump loses the Nov. 8 presidential election.

Spokesman Josh Earnest said Wednesday that Obama believes there is no place in American democracy for anyone using violence to advance a political goal.

Trump has been making unsubstantiated claims that the 50-state election system is "rigged" against him and in favour of Democrat Hillary Clinton. That has prompted fears about how some of his supporters might react if Trump doesn't accept an electoral defeat.

Obama this week said Trump should "stop whining" and go try to win some votes.

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3 p.m.

Jimmy Carter says concerns the U.S. elections will be rigged are "baseless."

The former president released a statement on Wednesday along with The Carter Center, the human rights organization he founded after leaving the White House. Carter's statement doesn't specifically mention Republican presidential nominee Donald Trump, who has repeatedly made unsubstantiated complaints that the election is rigged against him.

The Carter Center has monitored more than 100 elections around the world, but never in the U.S. Carter says he's seen "problematic" elections in that work.

Carter said allegation of election-rigging and voter fraud in the U.S. are baseless. He said they serve "only to undermine confidence in our democratic processes and inflame tensions."

The Carter Center says it has "great confidence" in the integrity of U.S. elections.

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2:50 p.m.

Mike Pence is predicting Wednesday's final presidential debate will revolve around "bigger things" facing the nation, rather than controversies surrounding Hillary Clinton.

The Republican vice-presidential nominee still used a Wednesday rally in Durango, Colorado, to hammer the Democratic nominee with a litany of familiar Republican attacks.

But Pence told hundreds of Donald Trump supporters that "this election is about a lot bigger things than her small ethics."

He cited national security, the economy and Supreme Court appointments, and he said he expects those issues "are going to be talked about tonight.

Pence plans to attend the Las Vegas debate.

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2:45 p.m.

A conservative activist has released secretly recorded and selectively edited video footage of a Democratic activist bragging about deploying troublemakers at Donald Trump rallies.

The footage was released this week by James O'Keefe. His group, Project Veritas, promises to release additional videos ahead of the election.

After the video was released, two Democratic operatives stopped working on the presidential race. One of them is portrayed in the footage as boasting about his connections to the party and the Clinton campaign. He also claims to have arranged for people to incite violence at Trump rallies.

Both the Democratic Party and Hillary Clinton's campaign have denounced the tactics described in the footage and said the activities described never took place.

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1:40 p.m.

President Barack Obama isn't losing sleep over the fact that a half-brother may attend the final presidential debate as a guest of Donald Trump's campaign.

White House spokesman Josh Earnest says Obama hasn't spent "a lot of time" considering whether Malik Obama will be in the audience to watch Trump and Hillary Clinton. The Trump campaign has invited Malik Obama, who supports the Republican nominee.

Earnest he says he hopes Malik Obama will do something "more fun" than just attend the debate in Las Vegas if he does show up.

Earnest says Obama and his half-brother don't have much of a relationship. They share a father but have different mothers.

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1:30 p.m.

Tim Kaine is predicting a "scorched-earth" debate performance from Republican Donald Trump.

Ahead of Wednesday night's presidential debate, the Democratic vice-presidential nominee said running mate Hillary Clinton will be cool and collected in the face of Trump's likely insults and histrionics.

Kaine made the comments at a campaign rally in Springfield, Ohio, where he called Trump a "bully."

Both presidential campaigns have been using their debate guests as a tool to try to get inside their rivals' heads.

Trump is bringing Barack Obama's half-brother, Malik Obama, a Trump supporter. Clinton is bringing frequent Trump critic and billionaire Mark Cuban and Hewlett Packard Enterprise CEO Meg Whitman.

At the second debate Trump invited women who have accused former President Bill Clinton of sexually harassing or assaulting them.

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12:25 p.m.

The top House Democrat says Donald Trump's unfounded allegations that the November elections are rigged are irresponsible.

House Minority Leader Nancy Pelosi told reporters Wednesday that challenging the integrity of the voting system intrudes on "sacred ground."

Without using the Republican presidential candidate's name, the California Democrat said such charges have been made without facts and by someone who's been "almost relishing the involvement of Russia prying into our records."

U.S. intelligence officials have blamed the Russians for hacking Democratic emails to try swaying the elections. This summer, Trump suggested he'd like to see the Russians find missing emails from Democratic candidate Hillary Clinton.

Pelosi said claiming a rigged election "on the basis of nothing, is really so irresponsible, it goes beyond the pale."

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12:05 p.m.

Donald Trump's campaign manager says she doesn't believe there's widespread voter fraud in the United States.

Kellyanne Conway said "it would not be for me to say" that there was widespread fraud absent overwhelming evidence. She says there's fraud "here and there" including past incidents of dead people on voter lists and people voting in multiple places.

Conway's comments Wednesday on MSNBC appear to undercut Trump's unsubstantiated claim that massive fraud is rigging the election against him.

Trump also says the media is rigging the election for Hillary Clinton. But Conway says that while some journalists are colluding with the Clinton campaign, it's "certainly not all, or even most."

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11:15 a.m.

Tim Kaine says he wants Hillary Clinton to "win big" so that no one will believe rival Donald Trump's claims of a rigged election.

The Democratic vice-presidential candidate was urging supporters in Ohio to run up the score against Trump. The Republican presidential nominee who has made unsubstantiated claims that the election has been fixed in Clinton's favour.

Kaine said that the bigger Clinton's margin of victory is, "the harder it is for him to whine and have anybody believe him."

Kaine said Trump's claims of election rigging are an insult to American democracy. He said "it's shameful."

Kaine said he hoped the moderator of Wednesday's presidential debate, Fox News host Chris Wallace, would challenge Trump and not let him simply lob insults at Clinton.

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10:10 a.m.

No matter how persuasive Donald Trump and Hillary Clinton are at Wednesday night's debate, it's already too late for either to win over millions of voters.

Advance voting by mail or in person is now underway in more than 30 states. At least 2.1 million voters have already cast ballots.

More than 45 million people are expected to vote before Election Day, Nov. 8.

In Nevada, site of the debate, absentee ballots were being mailed out Wednesday.

Early balloting so far has shown promise for Clinton in battlegrounds North Carolina and Florida while Trump has generally held ground in Iowa and Ohio.

Early voting is traditionally favoured by Democrats and is a key part of the Clinton campaign's strategy. Trump is counting on a stronger performance on Election Day itself.

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9:40 a.m.

Donald Trump's campaign manager is acknowledging that the Republican presidential nominee needs a "comeback" in the final weeks of the campaign.

Kellyanne Conway said that Trump has pulled off comebacks several times before. It's a rare acknowledgement by the confident billionaire's campaign that he could ultimately fall short. She spoke to Fox News on Wednesday ahead of the third and final presidential debate.

Conway's comment comes amid a string of battleground state polls showing Clinton ahead.

Conway said she doesn't understand why Hillary Clinton hasn't been able to "put him away" given her experience and her campaign's "endless amounts of money." She said, "What is her problem, already?"

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7:20 a.m.

President Barack Obama's half-brother says he doesn't agree with the decision by another half-brother to attend the final presidential debate as a guest of the Donald Trump campaign.

Mark Obama Ndesandjo said, "I love my brothers, but no one member represents the Obamas."

The Trump campaign said Obama's Kenyan-born half-brother Malik would be in the audience for the showdown Wednesday between Trump and Hillary Clinton.

The three men share the same father but have different mothers.

Ndesandjo is an American businessman who has lived in the southern Chinese city of Shenzhen for about 15 years.

In an email to The Associated Press, he said: "Others in my family and I do not support my brother Malik's position on Mr. Trump." Malik Obama supports Trump's candidacy.

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3:25 a.m.

Hillary Clinton and Donald Trump's ugly and acrimonious battle for the White House is barrelling toward the end, with the candidates taking the debate stage Wednesday night for one final primetime showdown.

For Trump, the debate is perhaps his last opportunity to turn around a race that appears to be slipping away from him. His predatory comments about women and a flood of sexual assault accusations have deepened his unpopularity with women and limited his pathways to victory.

Clinton takes the stage facing challenges of her own. While the electoral map currently leans in her favour, the Democrat is facing a new round of questions about her authenticity and trustworthiness, concerns that have trailed her throughout the campaign.

News from © The Associated Press, 2016