Pulling The Plug?

Harry Brighouse hears some murmuring:

So I hear (via a prominent member of the sane Republican faction) that the word on the right side of the street is that the Republican National Committee is about to pull the plug on its joint ads with the McCain campaign, and devote its resources instead to trying to save a couple of the senators who are at serious risk of losing their seats. Now this is gossip, albeit of the high class variety; take it with the requisite pinch of salt.