But a Democratic House and Senate would allow Trump to blame everything from North Korean nukes to Chinese tariffs on Congress. In Trump’s telling, if a dinner steak at the White House in 2019 were served medium rare instead of well done, Nancy Pelosi and Chuck Schumer would somehow be responsible.

Control of Congress would, of course, give the Democrats subpoena power to probe the misdeeds, the self-dealings and smarmy financial arrangements that come with the Trumpian approach to government.

But the president and his family would be mostly off-limits. Since White House staffers are normally protected by executive privilege, a Democratic Congress would probably be stymied in any effort to learn precisely how Jared Kushner and Ivanka Trump made a minimum of $83 million in income and capital gains last year.

That’s why the continuing threat to Trump himself comes from the Robert Mueller investigation rather than from a Democratic takeover of Congress.