He has also launched an all-out war against the "rigged" media, which he says is just an extension of the Clinton political machine, threatening to sue the New York Times for printing a story about claims from two women that Trump touched them inappropriately.
Trump has blasted the allegations as false and said that he has "substantial" evidence that they are so.
"Every time I say it can't get worse it gets worse, so I've stopped saying it can't get worse," he said.
And ABC News political commentator Cokie Roberts predicts "it could be an awful three-and-a-half weeks ahead for the American people and for us to watch what's likely to come forward,"
After a video surfaced of Trump bragging more than a decade ago about his ability to grope women as "a star," he faced a backlash not only from women and Democrats, but from Republicans as well.
Trump apologized for the remarks, which he also dismissed as "locker room banter," but went on the offensive against former President Bill Clinton and his history with women.
Amid suggestions that more tapes existed with Trump making controversial remarks, the real estate magnate said that he would keep talking about the Clintons.
"If they want to release more tapes saying inappropriate things, we'll continue to talk about Bill and Hillary Clinton doing inappropriate things," said Trump said in Pennsylvania.
The four women who are going to appear on Hannity's show -- Paula Jones, Juanita Broaddrick, Kathleen Willey and Kathy Shelton -- have previously spoken on behalf of Trump.
It remains unknown who arranged the Hannity appearance.
Meanwhile, the campaign has been making fast changes in the past days and hours -- the most notable that is pulling its operations out of Virginia and putting them into other battleground states, according to two senior-level sources.
Trump has events scheduled events in North Carolina on Oct. 14, New Hampshire and Maine the next day and Wisconsin and Grand Junction the days after that, according to his website.
Casting the Election in Existential Terms
Trump has upped the rhetoric in the last several campaign appearances, saying in West Palm Beach on Oct. 13 that the "survival" of the country depends on the election.
"This is a struggle for the survival of our nation," he said. "Believe me."
He has also cast himself as somewhat of a martyr for his supporters.
"They knew they would throw every lie they could at me. And my family. And my loved ones," he told the crowd. "They knew they would stop at nothing to try to stop me. But I never knew, as bad as it would be, I never knew it would be this vile. That it would be this bad. That it would be this vicious.
"Nevertheless, I take all of these slings and arrows gladly for you."
Trump added: "our great civilization here in America and across the civilized world, has come upon a moment of reckoning."
Trump has been saying recently that the deck is stacked against him, from the "rigged" media, which is a "political special interest no different than any lobbyist or other financial entity with a total political agenda" to Republican leadership that has turned its back on him instead of giving him support at a crucial time.
"This is not simply another four-year election," he said in West Palm Beach. "This is a crossroads in the history of our civilization. That will determine whether or not we, the people, reclaim control over our government.
Trump has warned that forces will try to steal the election and encouraged supporters to be observers at polling stations in an attempt to stop the "rigged system."
He has warned of a "rigged" general election, despite little or no evidence of voting fraud in the past several years, and rigged Democratic and Republican primaries.
"This election will determine whether we're a free nation or whether we have only the illusion of democracy, But are, in fact, controlled by a small handful of global special interests rigging the system," he said in West Palm Beach. "And our system is rigged. This is reality. You know it. They know it. I know it. And pretty much the whole world knows it. The establishment and their media enablers wield control over this nation through means that are very well known.