Is that South Carolina doomsday clock still ticking off the remaining seconds in Graham's term?

WASHINGTON — Senator Lindsey Graham, one of the chief sponsors of a nascent plan to address energy and climate change in the Senate, said Friday that the proposal had no chance of passage in the near term and called for a “pause” in consideration of the issue.

But his two co-sponsors, Senators John Kerry, Democrat of Massachusetts, and Joseph I. Lieberman, independent of Connecticut, vowed to press forward with a broad energy and global warming plan next week. They have been working with the White House and an array of business and environmental groups to fashion a package designed to reduce greenhouse gas emissions, reduce dependence on foreign oil and create millions of clean-energy jobs.

But Mr. Graham, Republican of South Carolina, said that the current political climate had made it impossible to consider such a difficult subject. In a statement Friday, he said that the oil spill in the Gulf of Mexico had heightened concern about expanded offshore drilling, which he considers a central component of any energy legislation. Mr. Graham also said that Democratic insistence on taking up immigration policy before energy had chilled his enthusiasm for any global warming measure.

Without the support of Mr. Graham and at least a handful of Republicans, the measure may well be dead for the year. Mr. Graham praised Mr. Kerry and Mr. Lieberman for their efforts, but said he would not join them.

“As I have previously indicated, a serious debate on energy legislation is significantly compromised with the cynical politics of comprehensive immigration reform hanging over the Senate,” Mr. Graham said in a statement. “In addition to immigration, we now have to deal with a catastrophic oil spill in the Gulf of Mexico, which creates new policy and political challenges not envisioned in our original discussions. In light of this, I believe it would be wise to pause the process and reassess where we stand.”