President Donald Trump's former lawyer Michael Cohen on Wednesday said he fears that Trump will not peacefully relinquish the White House if he loses his reelection bid next year.

Cohen, 52, also castigated Trump at the finale of his congressional hearing for his ''childish'' actions that he says denigrate the office of the president.

"I fear that if he loses the election in 2020, that there will never be a peaceful transition of power. And this is why I agreed to appear before you today," Cohen said of Trump.

The White House did not immediately respond to CNBC's request for comment on Cohen's remarks.

Cohen's closing speech came after more than seven hours in public testimony before the House Oversight Committee, where he launched a fusillade of accusations against his former boss' character and actions.

Read Cohen's full closing statement below: