Because they want to win? And will use every bit of ammunition no matter how hypocritical? You know, kinda like Donald Trump using Democrat talking points to diminish what Scott Walker has achieved in Wisconsin.
Oh please. Almost no one is going to circle the wagons during primary season, and the ones that do are simply calculating it helps them more in their goal of being the nominee to say nothing. It's all a political calculation because they will all fight near to the death to win.
This isn't kids games here, it's more a blood sport.
You are entitled to your opinion, however, I disagree. For once, it would be nice to see the Republicans put forth a united front to shut up the MSM and DEMS. Just once - instead, they eat their own. Some of these guys have no chance of winning - so they are wasting their time and money anyway.