The Senate may not bring major climate legislation up for a vote this year, Sen. Chuck GrassleyChuck GrassleyGOP senators pitch alternatives after House pulls ObamaCare repeal bill Friends, foes spar in fight on Trump’s Supreme Court nominee Live coverage: Day three of Supreme Court nominee hearing MORE (R-Iowa) said today.

The House passed the controversial legislation by a slim margin a few weeks ago, but Grassley says Majority Leader Harry ReidHarry ReidThis obscure Senate rule could let VP Mike Pence fully repeal ObamaCare once and for all Sharron Angle to challenge GOP rep in Nevada Fox's Watters asks Trump whom he would fire: Baldwin, Schumer or Zucker MORE has been downplaying the chances of Senate passage.

"He didn't really say it wasn't coming up this year, but when I look at the rest of July until August 8th and then everything after Labor Day, including Thanksgiving and then Christmas, we only have about 15 to 17 weeks left this year," Grassley told Radio Iowa.

The Iowa Republican is the ranking member of the Senate Finance Committee, which has jurisdiction over some elements of the climate legislation that would raise revenue or affect the tax code.

But the Finance Committee is busy trying to pound out a healthcare compromise, the White House's top priority.

"[W]ith health care reform, all of the appropriation bills and probably some banking regulatory reform, I don't know that there would be time for it to come up even if we didn't do some of those things," Grassley said.