President Trump doesn’t have the power, even if he wanted it, to rid Washington of the corruption, the revolving door, and the cash-for-access and quid-pro-quo dealing that infects K Street. But he does have the power to drain a bit of the swamp.

He could say “knock it off” to all the friends and associates who followed him to Washington in hope of making a fortune from their connections to him. He could set a policy of refusing access to anyone brought to his door by swamp creatures such as Michael Cohen and Corey Lewandowski.