This is the best essay I’ve read on the case for impeaching Trump. George Conway discusses Founding intent of the impeachment clause, as well as Trump’s clear and routine “breach of trust” (which also raises the possibility of a Constitutional takeover by his cabinet):
Trump’s erratic behavior has long been the subject of political criticism, late-night-television jokes, and even speculation about whether it’s part of some incomprehensible, multidimensional strategic game. But it’s relevant to whether he’s fit for the office he holds. Simply put, Trump’s ingrained and extreme behavioral characteristics make it impossible for him to carry out the duties of the presidency in the way the Constitution requires. To see why first requires a look at what the Constitution demands of a president, and then an examination of how Trump’s behavioral characteristics preclude his ability to fulfill those demands.