Questions I have about contemporary politics

There are many things I don't understand about contemporary U. S. politics. Perhaps someone can explain this one to me. No matter how much damage the Democratic loose cannons in the Baucus "we work for the health insurance companies" caucus do to President Obama's struggle to reform health insurance coverage, he never calls them out. But at the same time he throws the embattled New York State Gov. Patterson to the wolves . In addition to the fact that Patterson is one of only two Black governors currently serving (Massachusetts's Deval Patrick is the other) and he will almost surely be replaced by a white man - Democrat or Republican - it would seem that a Democratic president would support a Democratic governor.

So why are the extreme right-wing obstructionist Blue Dog Senate Democrats untouchable, while Patterson (in current media parlance) gets thrown under the bus? Any answers?