The push-back has come in recent days from Sens. Kent Conrad (D-N.D.), chairman of the Senate Budget Committee, and Joe Manchin (D-W.Va.), a freshman who is running for reelection next year. Sen. Mark Pryor (D-Ark.) told constituents during the Easter recess that he would not vote to lift the debt limit without a “real and meaningful commitment to debt reduction.”

Even Sen. Amy Klobuchar (D-Minn.), generally a stalwart White House ally, is undecided on the issue and is “hopeful” that a debt-ceiling bill can be attached to a measure to cut the federal deficit, said her spokesman, Linden Zakula. Klobuchar is also up for reelection next year…

“As catastrophic as it would be to fail to raise our debt ceiling, it’s even more irresponsible to not take this opportunity to own up to our unsustainable spending path,” Sen. Mark Udall (Colo.), another Democrat challenging the White House, said in a statement his office released this week. “If we don’t take action to reduce our deficit spending, Congress will be facing this same debt ceiling vote in the near term – still with no end to our deficits in sight.”