The US president shared the videotaped address to social media on Wednesday, in which he repeated previous attacks on the electoral process, alleged widespread voter fraud, and claimed Democrats were involved in a conspiracy against him.
Adam Kinzinger, an Illinois Representative, shared the US president’s speech on Twitter and wrote that it was “Time to delete your account”.
Mr Kinzinger, who has attacked Mr Trump in the past, wrote last week that allegations about a rigged election were "baseless conspiracy theories."
"The FBI did not rig the election. If you find yourself believing they did, please stop, and say it out loud, and you will realize how silly it sounds,” the Republican wrote. “Donald Trump [is] simply flooding the zone with baseless conspiracies again".
William Barr, the attorney general, had said his justice department and the Federal Bureau of Investigations uncovered no evidence that would have overturned the election, which Mr Trump lost to Joe Biden.
The Department of Homeland Security also declared the presidential race to be “the most secure in American history,” in a report that led to Mr Trump terminating the country’s top cybersecurity official, Chris Krebs.
The president, despite pressure to do so, has so far refused to accept his defeat and continued to push allegations the election was “rigged” or “stolen”.