What will happen if the blue wave in the midterm elections falls short? Clearly, at this point it still might: Democrats will surely receive more votes than Republicans, but thanks to gerrymandering and population geography, the U.S. electoral system gives excess weight to rural, white voters who still have faith in President Trump. What if, thanks to that excess weight, the minority prevails?

One answer, obviously, is that the unindicted co-conspirator in chief will continue to be protected from the law. And for those concerned with the survival of American democracy, that has to be the most important issue at stake in November. But if the G.O.P. hangs on, there will also be other, bread-and-butter consequences for ordinary Americans.

First of all, there is every reason to believe that a Republican Congress, freed from the immediate threat of elections, would do what it narrowly failed to do last year, and repeal the Affordable Care Act. This would cause tens of millions of Americans to lose health insurance and would in particular hit those with pre-existing conditions. There’s a reason health care, not Trump, is the central theme of Democratic campaigns this year.

But the attack on the social safety net probably wouldn’t stop with a rollback of Obama-era expansion: Longstanding programs, very much including Social Security and Medicare, would also be on the chopping block. Who says so? Republicans themselves.