"Leadership doesn't have a whip count on this that says they can win," Mr. Manning said. "There's probably 40 to 50 [Republicans] hard against right now, and another 50 or 60 who are truly undecided. So the leadership has a long way to go to get the votes they need."
"It is inconceivable that a Republican who has opposed Obama's power grabs could then vote to trust Obama with an issue as important as Obamatrade," said Rick Manning, president of Americans for Limited Government, an advocacy group opposed to trade-promotion authority that is airing radio ads nationwide targeting vulnerable lawmakers. "We're dealing with someone who has a track record."