Democrats: You have to vote for democrats to stop Trump from round up people and shipping them to concentration camps for slave labor.
Also Democrats: Ve shall round up und eradicate ze undesirables from society!!! Ve shall put zem into ze camps and ve shall enslave them to benefit ze superior class!!!
You'll notice that's due to a supreme court ruling, the same supreme court trump managed to stuff last tkme he got power. If the Dems get a workable majority in both houses and the presidency you'll at least have fighting chance that they'll push back on some of this stuff. trump is slavering at the prospect of making it worse, and has been clear that he intends to.
Don't get me wrong, it's a lousy system and a poor set of choices, but one is clearly worse than the other, and they both actually have a recent track record of being president, so you can make an informed choice.
Critically though, this isn't just about the president, but also every other position on the ballot too.