Dershowitz, one of the President's attorneys at his impeachment trial, is now explicitly arguing that Trump cannot be impeached for using the powers of his office to blackmail foreign states into doing him political favors.
Dershowitz's argument means that there would be no remedy against President Trump if, say, he promised Erdogan a political favor in exchange for Erdogan agreeing to have one of Trump's political rivals who travels through Turkey arrested and detained indefinitely.
Dershowitz's argument means that if President Trump were to, say, ask Xi to arrest a family member of Susan Collins, and then hold the family member without trial until Collins voted against hearing witnesses, there's no remedy under the Constitution to check that abuse of power.
