Michael Cohen is an American attorney who gained prominence as a personal lawyer for Donald Trump, the 45th President of the United States. Cohen worked for Trump for over a decade, handling various legal matters and business dealings. He became widely known for his involvement in controversies surrounding Trump's presidency. In 2018, Cohen pleaded guilty to multiple criminal charges, including tax evasion and campaign finance violations. His testimony before Congress revealed details about his work with Trump and raised questions about the legality of certain actions taken during the 2016 presidential campaign. Cohen's legal troubles led to a prison sentence, which he began serving in 2019.