In Mr. Porter’s case, one of his former wives, Jennifer Willoughby, obtained a restraining order against him, while the other, Colbie Holderness, presented a photograph of herself with a black eye, which she said came from being hit by Mr. Porter while the couple was on vacation in Italy.
The F.B.I. and the White House knew of these charges for months, and Mr. Porter’s application for a security clearance had been held up because of them. Mr. Kelly has told his staff he ordered Mr. Porter to be fired 40 minutes after learning of the charges against him, an assertion that other officials disputed.
In the case of Mr. Sorensen, his former wife, Jessica Corbett, told F.B.I. agents conducting a background check on him that he had run over her foot while driving a car and extinguished a cigarette on her hand during a turbulent two-and-a-half-year marriage.
For his part, Mr. Trump praised Mr. Porter, saying on Friday, “He did a very good job when he was in the White House, and we wish him well.” The president made no mention of the women Mr. Porter is said to have abused.
Mr. Trump’s tweet also echoed his response last year to allegations that Roy S. Moore, the Republican candidate for the Senate seat in Alabama, had molested underage girls. Mr. Trump endorsed Mr. Moore, who lost the campaign to the Democrat, Doug Jones.
The president’s inclination to reject accusations against him goes beyond those lodged by women, including, most notably, allegations that his presidential campaign colluded with the Russians.
Earlier on Saturday, Mr. Trump cited a report in The New York Times that American intelligence agents had given $100,000 to a shadowy Russian who claimed to have compromising material on Mr. Trump, as well as cyberweapons that had been stolen from the National Security Agency.
In a tweet, Mr. Trump said, “According to the @nytimes, a Russian sold phony ‘secrets’ on Trump to the U.S.” He added, “I hope people are now seeing & understanding what is going on here. It is all now starting to come out — DRAIN THE SWAMP!”