It’s not hard to picture the team behind HBO’s “White House Plumbers” finishing work on an episode of “Veep” and picturing that stellar comedy’s tone being applied to the idiots behind the Watergate break-in. (The director of all five episodes here is David Mandel, showrunner on that massive critical darling.) And as the country once again goes through considerations of impeachment and general malfeasance in the highest offices of the United States, the timing seems just right for a scathing look at one of the key points in our continuing disillusionment with the government.