Michael Cohen, who represented Trump for a decade, laid out for Congress for the first time a series of deceptions by the president. He charged that Trump lied to the public about business interests in Russia, lied to reporters about stolen Democratic emails and told Mr. Cohen to lie about hush payments to cover up sexual misconduct. “He is a racist. He is a con man. And he is a cheat,” Mr. Cohen said of the president. Cohen, who has pleaded guilty to lying under oath to Congress, among other crimes, said he did so to protect Trump. “I am not protecting Mr. Trump anymore,” he said.