Why is he so bitter that he can't even get himself to say her name?
I mean, it kinda makes sense. This guy has been fighting for Democrats in the Texas trenches for decades and just as his state is finally turning blue some rando who's big political accomplishment is losing a house race beats him in a senate primary. Not that he shouldn't be 110% behind Hegar anyway.
Lets not even forget Hegar voted for Romney and Mccain.
That helps her campaign. These suburban wine moms look at her and see themselves, and they say "I didn't leave the Republican Party, the Republican Party left me." And then they vote straight-ticket D.