Detailed here. Note the reason why Pelosi dislikes House Republican Whip Eric Cantor:
Pelosi has good personal relationship with House Minority Leader John A. Boehner (R-Ohio). But members of her leadership cadre are starting to really dislike Cantor, despite their public pose of studied indifference. Part of the reason: Cantor is employing many of the same techniques Pelosi used so successfully to torture former House Speaker Dennis Hastert when she was the Democratic whip in 2002 and 2003.
It remains to be seen if Cantor’s power-of-“no” philosophy will work — congressional approval ratings have actually spiked on the stimulus — but he’s gotten traction by nitpicking Pelosi’s proposals and magnifying the majority’s blunders.
Sauce for the goose . . .