Michael Cohen, former attorney for President Donald Trump, testifyies during the House Oversight and Reform Committee hearing on Russian interference in the 2016 election on Wednesday, Feb. 27, 2019. Bill Clark | CQ-Roll Call Group | Getty Images

President Donald Trump on Friday retweeted an unsubstantiated claim that the father-in-law of his former lawyer Michael Cohen is a "loan shark." Tweet That retweet was one of a series of re-tweets that Trump posted Friday of original tweets by Paul Sperry, a conservative author and political commentator at the right-leaning Hoover Institute. Cohen, 52, last week called Trump a "racist" and a "con man" during testimony at the House Oversight and Government Reform Committee. After working for Trump for more than a decade, Cohen began cooperating last year with special counsel Robert Mueller and other federal investigators who are probing Trump. Cohen pleaded guilty last year to multiple charges.