As usual, not just Trump.
Overall about two thirds of Americans support the death penalty as of a 2026 Pew poll. Broken down in Party lines it's 84% of Republicans in that same poll (because of fucking course they support it that ardently!), but, shockingly, slightly over a half of Democrats also do.
So let's just call it "savage Americans and their love for the death penalty" for now.
edited: I misread a table and had to update the Democrats' results.