Undecided doesn’t necessarily mean they haven’t decided who to vote for. It means they haven’t decided if they’re going to go vote.

Alternatively it means they’re scared to say who they want to vote for because either they’re blue in a red area and are used to hiding it so they’re not shot or they know Trump is a piece of shit but are scared the Dems are going to force everyone to change genders and pee in front of each other.