After the dismissal of James Comey in May 2017, Tribe wrote: "The time has come for Congress to launch an impeachment investigation of President Trump for obstruction of justice." Tribe argued that Trump's conduct rose to the level of "high crimes and misdemeanors" that are impeachable offenses under the Constitution. He added: "It will require serious commitment to constitutional principle, and courageous willingness to put devotion to the national interest above self-interest and party loyalty, for a Congress of the president's own party to initiate an impeachment inquiry."