Trump says accusers 'will be sued after the election is over'

Trump aides said Gettysburg, the site of a major Civil War battle and Republican President Abraham Lincoln's famous address, was a fitting place for Trump to lay out a positive vision for the future of his party, which has suffered a schism between his supporters and the party's establishment.

During his speech Trump said, "Every woman lied when they came forward to hurt my campaign. Total fabrication. The events never happened. Never. All of these liars will be sued after the election is over."

"Just like we found out about these paid violent protesters, it was probably the DNC and the Clinton campaign that put forward these liars with their fabricated stories. But we'll find out about their involvement at a later date through litigation. And I look so forward to doing it," said Trump.

Trump is trailing Clinton in most polls - although he has narrowed the gap according to a Reuters/Ipsos poll released on Friday - and has less than three weeks to catch up.

Much of the campaign in recent weeks has focused on allegations that he made improper advances to women over decades, something he denies.

It is also being dominated by Trump's accusation that the election is "rigged" and that he may not accept the result.

Trump has planted some new policy details in recent speeches as he seeks to shift attention away from the recent controversies.

In the past week, for example, he laid out ethics rules to shut the "revolving door" between government and lobbying and proposed term limits for members of Congress.