Bloomberg/Morning Consult poll of nearly 5,000 (all online smh):
Almost six in 10 swing-state voters labeled Trump as dangerous — a concern far more pronounced among undecided voters, who make up less than one-tenth of the swing-state electorate. Even 28% of those who plan to vote for him in November agree that Trump is dangerous. Fewer than half as many Biden supporters said the same about their candidate.
Swing-state voters who volunteered that they had heard something about his recent comments degrading NATO were especially lopsided in thinking Trump was the more dangerous of the two candidates.