Green groups to Senate: Don’t ‘squander’ chance to move on climate and energy

The letter avoids mention of immigration reform – the issue that threatens to kill the already-uncertain prospects for climate legislation this year.

Sen. Lindsey GrahamLindsey GrahamThe Hill's 12:30 Report Russian interference looms over European elections Graham: I’m ‘all in’ for Trump MORE (R-S.C.) has been crafting a sweeping climate and energy measure with Sens. John KerryJohn KerryEllison comments on Obama criticized as 'a stupid thing to say' 'Can you hear me now?' Trump team voices credible threat of force Obama to attend Pittsburgh Steelers owner's funeral MORE (D-Mass.) and Joe Lieberman (I-Conn.). But Graham has backed away from the climate initiative because he’s furious that Democrats may bring immigration legislation to the floor this year.

Graham has long worked on immigration reform, but accuses Democratic leaders of moving ahead haphazardly and calls the immigration push an election-year gambit that can’t pass.