42%

Michelle Goldberg pointed out that when Herbert Hoover ran for re-election, he got 42% of the vote.  Hoover was a humanitarian and a total failure who had no grasp of how to deal with a Depression. It's not right to compare him to a murderous cretin like Donald tRump, but we can expect tRump to get at least 42% of the vote in November. Maybe more. That is the minimum.

I wonder what this says about human nature. It is the case that 42% of the voters are of below average intelligence, but they won't all vote for tRump.  Some will vote for other candidates.