Donald Trump

"As an example of the power structure I'm fighting, AT&T is buying Time Warner and thus CNN, a deal we will not approve in my administration because it's too much concentration of power in the hands of too few," Trump said during a speech on Saturday.

AT&T and Time Warner are reportedly in advanced talks about a potential deal. No acquisition has been confirmed yet, but an announcement could be imminent. (Time Warner is the parent company of CNN.)

Trump is set to offer up the key principles and policies driving his presidential campaign in a speech Saturday morning in Gettysburg, Pennsylvania.

The location is forever etched in American lore given that it was the battlefield where President Abraham Lincoln delivered his Gettysburg Address, though Trump will not speak at precisely the same spot.

Trump, speaking on Fox News Friday night, and his campaign aides declined to offer any substantive details of what he will address in the speech.

He also accused the first lady of attacking Hillary Clinton in 2007 by invoking a line she had said about fitness to run the White House.

The Obama campaign had denied the line referred to Mrs Clinton.

Mrs Clinton, meanwhile, accused Mr Trump of threatening democracy if he did not accept the election result.

"We know the difference between leadership and dictatorship, and the peaceful transition of power is one of the things that sets us apart," she told a crowd in Cleveland, Ohio.

Trump offered a stunning declaration during the final presidential debate that he might not accept the results of next month's election. In his first speech since the debate, Trump seemed to simultaneously double down on the stance he articulated Wednesday night while also trying to clean it up.

Trump argued forcefully during a rally here that he was being asked to "waive" his right to contest the election after critics slammed him for refusing to pledge to accept the results of the election the previous night during the final presidential debate.

In doing so, Trump missed an opportunity to take some of the heat off his campaign as it struggles through the final weeks of the race.

He opened with some more light-hearted remarks, referencing his "beautiful hands" and joking about how his crowds at rallies dwarf Clinton's.

"It's great to be here with 1,000 wonderful people. Or, as I call it, a small, intimate dinner with some friends. Or as Hillary calls it, her largest crowd of the season," Trump said, to which Clinton laughed.

But the mood turned dour when Trump began to directly take on Clinton.

Hillary Clinton was explaining her plans to raise taxes on the wealthy when she pointedly referred to Trump's possible tax avoidance: "My social security payroll contribution will go up, as will Donald's, assuming he can't figure out how to get out of it."

Trump's retort? "Such a nasty woman."

It quickly became one of the defining quotes of the night on social media.

This raises the possibility of an extraordinary departure from principles that have underpinned American democracy for more than two centuries.

"I will look at it at the time," Trump said when asked during the final presidential debate whether he would concede if he loses on November 8, following his claims that the election is "rigged" against him.

He added: "I will keep you in suspense."

Hillary Clinton will be joined at Wednesday's debate by two well-known billionaires who are backing her campaign, in what may be an attempt to rattle Republican nominee by su btly questioning his own net worth.

Meg Whitman, the Hewlett-Packard CEO and former Republican California gubernatorial candidate, and Mark Cuban, the outspoken billionaire owner of the Dallas Mavericks, will both be Clinton's guests at Wednesday's third and final presidential debate.

The New York Daily News had reported in 2006 that Trump had told an audience at a Learning Annex convention speech, "Condoleezza Rice, she's a lovely woman, but I think she's a bitch. She goes around to other countries and other nations, negotiates with their leaders, comes back and nothing ever happens."

Deadspin first resurfaced the New York Daily News story on Tuesday. When asked if she had any response to the New York Daily News report of Trump's remarks, Rice simply wrote back, "Exactly. Can't wait until November 9!"

Both nominees enter Wednesday's presidential debate -- the final showdown of the election season -- with historically high unfavorability ratings, and need to convince undecided voters why the country would be worse off with their opponent in the White House.