Donald Trump has provoked an angry backlash from Democrats after calling for the US armed forces to be turned against his political adversaries when voters go to the polls at next month’s presidential election. In comments that added further fuel to fears of an authoritarian crackdown if he recaptures the White House, the Republican nominee said the military or national guard should be deployed against opponents that he called “the enemy within” when the election takes place on 5 November. He singled out the California congressman, Adam Schiff, who was the lead prosecutor in the ex-president’s first impeachment trial, as posing a bigger threat to a free and fair election than foreign terrorists or illegal immigrants, his usual prime target for abuse. Trump’s comments, to Fox News in response to a question on possible election “chaos”, triggered an angry reaction from Kamala Harris’s campaign, which likened them to previous remarks that he would be a dictator “on day one” of a second presidency and his suggestions that the US constitution should be terminated to overturn the 2020 election result, which he falsely claims was stolen by Joe Biden. Trump and the vice-president are locked in a tight contest as election day looms. Most national polls put Harris narrowly ahead, but in the crucial swing states which will decide the election, the contest appears much tighter and offers Trump numerous paths to a potential victory. After initially saying election chaos would not come from his side, Trump launched a vituperative attack on his opponents when the interviewer, Maria Bartiromo, raised the possibility of outside agitators or immigrants who had committed crimes. “I think the bigger problem are the people from within. We have some very bad people. We have some sick people,” he said on Fox’s Sunday Morning Futures programme. “It should be very easily handled by, if necessary, by the national guard, or if really necessary, by the military, because they can’t let that happen.” Ruth Ben-Ghiat, a historian and expert on fascism at New York University, told NBC that Trump was flagging up what he planned to do as president, which she compared to the “‘strongman’ ruling templates of Viktor Orbán, Narendra Modi and Vladimir Putin, the leaders of Hungary, India and Russia respectively. “He’s actually rehearsing, in a sense, what he would be doing as head of state, which is what Orbán does, Modi is doing, Putin has long done,” she said. Trump also turned his fire on Schiff, who is a candidate for the US Senate in next month’s poll. He said: “The thing that’s tougher to handle are these lunatics that we have inside, like Adam Schiff.” It was his second attack in two days on Schiff, who earned Trump’s enmity when he was the ranking Democrat on the House of Representatives’ intelligence committee during his presidency, when he said there was evidence of collusion between Trump and Russia during the 2016. The House later voted, under Republican leadership, to censure Schiff over his comments. At a rally in Coachella, California – a state he has virtually no chance of winning – on Saturday, Trump mocked Schiff’s physical characteristics and labelled him a bigger threat than foreign adversaries, including the Chinese president Xi Jinping. “He [Xi] is somebody that we can handle,” Trump said. “The worst people are the enemies from within, the sleaze bags, the guy that you’re going to elect to the Senate, shifty Adam Schiff. He’s a major low-life.” He claimed, without providing evidence, that Schiff was engaged in mass voter fraud. “They send millions and million of ballots all over the place,” he said. “[In] California, you don’t have anything like a voting booth. They take ballots and they just send them all over the place. They come back and they say, oh, somebody won by 5m votes.” Schiff responded on Twitter/X by accusing Trump of inciting violence in the same manner as he was widely accused of doing on 6 January 2021, when a mob attacked the US Capitol in an effort to stop certification of Biden’s election win. “Today, Trump threatened to deploy the military against the ‘enemies from within.’ The same thing he has called me,” Schiff wrote. “Just as he incited a mob to attack the Capitol, he again stokes violence against those who oppose him.” Harris’s campaign issued a more extensive condemnation. “Donald Trump is suggesting that his fellow Americans are worse ‘enemies’ than foreign adversaries, and he is saying he would use the military against them,” campaign spokesperson Ian Sams said. “Taken with his vow to be a dictator on ‘day one’, calls for the ‘termination’ of the constitution, and plans to surround himself with sycophants who will give him unchecked, unprecedented power if he returns to office, this should alarm every American who cares about their freedom and security. “What Donald Trump is promising is dangerous, and returning him to office is simply a risk Americans cannot afford.” While Trump, being out of power, will be in no position to deploy troops on election day, his call for military power to quell political opposition is familiar, recalling his demand that soldiers be deployed in the streets of Washington DC in 2020 to disperse thousands of demonstrators protesting the death of George Floyd. Gen Mark Milley, the then chairperson of the joint chiefs of staff, reportedly came close to resigning over the demand. Milley, who has since fallen foul of Trump, is quoted in a new book by Bob Woodward – the journalist who, along with Carl Bernstein, helped to expose the Watergate scandal of the 1970s – as calling the ex-president “a total fascist” and has voiced fears that he could be recalled to service and court-martialled if he returns to office.