Michael Cohen, President Donald Trump's former personal attorney, pleaded guilty Thursday morning to lying to Congress about the timeline of a Russian real estate project pursued by Trump during the 2016 election.

The new charges were brought by the office of Special Counsel Robert Mueller, with which Cohen is now cooperating.

According to court filings, Cohen provided written and oral testimony to the congressional investigations conducted by both the U.S. Senate and House of Representatives into Russian interference in the presidential election won by Trump.