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.
Getting out the vote is so important!