What trap?
The trap that thinking that lack of excitement at her rallies translating in to few votes.
Yes, the dems are not quite happy with their nominee, but they WILL turn out to vote for her because that is all they know. They won't vote with enthusiasm, but they will be out there to vote.
The trap of (gasp!) thinking that Trump might actually be better than Romney and McCain, and might really WIN this thing.
You see, some posters have a huge fear of thinking big.