makattak:
"The Democrats know how to keep their members in line."
They have a very sophisticated system for generating election wins. (Almost to the point of knowing which individual voter on which block is the critical one. Almost.)
The threat of withdrawal of that technical support is even more significant than the threat of withdrawing financial and logistical support. Put together, it's more than a mere whip cracking, it's direct political survival.
They also have very dedicated people with free time for logistical support, like canvassing and just stapling campaign materials together. Note the "very." Note the "free time."
There. I said it and I ain't takin' it back.
I'm not signing this one so nobody will know who posted it.