He is using the office he holds to advance his extraordinary lifetime project of assigning unchecked power to the president. Buried behind our president’s endless stream of lies and malicious self-serving remarks are actions that far transcend any reasonable understanding of his legal authority. Donald Trump disdains, more than anything else, the limitations of checks and balances on his power. Witness his assertion of a right to flout all congressional subpoenas; his continuing refusal to disclose his tax returns, notwithstanding Congress’s statutory right to secure them; his specific actions to bar congressional testimony by government officials; and his personal attacks...