"So what did the Democratic Party establishment do when a Senator who allegedly impedes their agenda faced a primary challenger who would be more supportive of that agenda? They engaged in full-scale efforts to support Blanche Lincoln. Bill Clinton traveled to Arkansas to urge loyal Democrats to vote for her, bashing liberal groups for good measure. Obama recorded an ad for Lincoln which, among other things, were used to tell African-American primary voters that they should vote for her because she works for their interests. The entire Party infrastructure lent its support and resources to Lincoln — a Senator who supposedly prevents Democrats from doing all sorts of Wonderful, Progressive Things which they so wish they could do but just don’t have the votes for.

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What happened in this race also gives the lie to the insufferable excuse we’ve been hearing for the last 18 months from countless Obama defenders: namely, if the Senate doesn’t have 60 votes to pass good legislation, it’s not Obama’s fault because he has no leverage over these conservative Senators. It was always obvious what an absurd joke that claim was; the very idea of The Impotent, Helpless President, presiding over a vast government and party apparatus, was laughable. But now, in light of Arkansas, nobody should ever be willing to utter that again with a straight face. Back when Lincoln was threatening to filibuster health care if it included a public option, the White House could obviously have said to her: if you don’t support a public option, not only will we not support your re-election bid, but we’ll support a primary challenger against you. Obama’s support for Lincoln did not merely help; it was arguably decisive, as The Washington Post documented today:"

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http://www.salon.com/2010/06/10/lincoln_6/