Republican presidential candidate Donald Trump will "100 percent" accept the results of the US election if it is fair - at least according to his son Eric Trump.
"I think what my father is saying is, 'I want a fair election,'" Eric Trump said on ABC's This Week on Sunday (US time).
"If it's a fair outcome, he will absolutely accept it. There's no question about that."
With national opinion polls showing Hillary Clinton with an increasing lead over Mr Trump ahead of the November 8 election.
Mr Trump has repeatedly said the election is being "rigged" against him, but has not offered evidence and numerous studies have shown that the US election system, which is decentralised and run by the states, is sound.
At last week's debate with Democratic rival Ms Clinton, Mr Trump challenged a cornerstone of American democracy by refusing to commit to honouring the result of the US election.
"What I'm saying is that I will tell you at the time. I'll keep you in suspense. OK?" Mr Trump said.
In the aftermath of the debate, Mr Trump said he would accept the election outcome "if I win".
Mr Trump's campaign manager, Kellyanne Conway, also was pressed on Sunday on CNN's State of the Union on whether Mr Trump would accept the election results.
"The system is rigged, especially against the little guy," said Ms Conway without directly responding to the question. She spoke of any challenges to the election results as "hypothetical".
The efforts by members of Mr Trump's inner circle to downplay his remarks about the integrity of the election indicate he would come under significant pressure to accept the result if he were to lose.
Ms Clinton and Mr Trump will campaign on Sunday in the key swing states of Florida and North Carolina, where the latest polls show they are within only a few points of each other.
Overall, Ms Clinton has a 12-point lead according to the latest poll from ABC and the Washington Post.
Reuters / Newshub.