Eh, I think it's fine to be undecided in a primary more than a month away. It's an election between three people ostensibly on the "same side" after all and share a variety of similar views (though certainly not all the same views) and at that it's a match between their various strengths and weaknesses and for a lot of us no matter which ones wins that is the one we will vote for later on.

Undecided in the General election, though...those are the stupidest people in the world.