The comments from John Kelly, the retired Marine general who worked for Trump in the White House from 2017 to 2019, came in interviews with both The New York Times and The Atlantic. They build on a a growing series of warnings from former top Trump officials as the election enters its final weeks.

Kelly has long been critical of Trump and previously accused him of calling veterans killed in combat "suckers" and "losers." Still, his new warnings came just two weeks before Election Day, as Trump seeks a second term vowing to dramatically expand his use of the military at home and suggesting he would use force to go after Americans he considers "enemies from within."

"He commented more than once that, 'You know, Hitler did some good things, too,'" Kelly recalled to The Times. Kelly said he would usually quash the conversation by saying "nothing (Hitler) did, you could argue, was good," but that Trump would occasionally bring up the topic again.

In his interview with The Atlantic, Kelly recalled that when Trump raised the idea of needing "German generals," Kelly would ask if he meant "Bismarck's generals," referring to Otto von Bismarck, the former chancellor of the German Reich who oversaw the unification of Germany. "Surely you can't mean Hitler's generals," Kelly recalled asking Trump. To which the former president responded, "Yeah, yeah, Hitler's generals."

Trump's campaign denied these stories on Tuesday, with Steven Cheung, a Trump campaign spokesman, arguing Kelly has "beclowned himself with these debunked stories he has fabricated."

Polls show the race is tight in a string of swing states, and both Trump and Vice President Kamala Harris are crisscrossing the country making their final pitches to the sliver of undecided voters.

Minnesota Gov. Tim Walz, Harris' running mate who served 24 years in various units and jobs in the Army National Guard, quickly used the interviews to assail Trump on Tuesday night.

"Folks, the guardrails are gone," Walz said speaking in Wisconsin. "Trump is descending into this madness -- a former president of the United States and the candidate for president of the United States says he wants generals like Adolf Hitler had."

Kelly also said in his interview with The Times that Trump met the definition of a fascist. After reading the definition aloud, including that fascism was "a far-right authoritarian, ultranationalist political ideology and movement characterized by a dictatorial leader," Kelly concluded Trump "certainly falls into the general definition of fascist, for sure."

Kelly added that Trump often fumed at any attempt to constrain his power, and that "he would love to be" a dictator.

"He certainly prefers the dictator approach to government," Kelly told The Times. Adding later, "I think he'd love to be just like he was in business -- he could tell people to do things and they would do it, and not really bother too much about whether what the legalities were and whatnot."

Kelly is not the first former top Trump administration official to cast the former president as a threat. Retired Army Gen. Mark A. Milley, who served as Trump's chairman of the Joint Chiefs of Staff, told Bob Woodward in his recent book "War" that Trump was "fascist to the core" and "the most dangerous person to this country." And retired Gen. Jim Mattis, who worked as U.S. secretary of defense under Trump, reportedly later told Woodward that he agreed with Milley's assessment.