Donald Trump vowed a political comeback Sunday as the major parties clashed over Democrat threats to prosecute top administration officials after the president's Republicans lost control of Congress in midterm elections.

The devastating results in last Tuesday's vote leave Trump politically hamstrung as he enters the remaining two-year 'lame duck' period of his White House tenure. It also opens the door to multiple investigations by the Democrat-controlled Congress of the president, his family and senior members of his administration.

On political talk shows Sunday, incoming congressional leaders from the Democratic Party promised to hold Trump and his aides to account, while the president's top law officer resolved to defend them and Trump dug in his heels on social media.

"America took a giant step back in History with the results of the last Election," Trump said in a post on Truth Social, adding that the...