Sen. John McCainJohn McCainUS democracy is in crisis. Trump voters must help us get past it. The rise of Carlson, and the fall of Van Susteren Booker to vote against Tillerson MORE (Ariz.) cast doubt Tuesday on the Democratic agenda to pass a climate change bill, taking a mild swipe at rival Barack ObamaBarack ObamaDems engage in friendly debate for DNC chair Army: Manning to lose transgender benefits Why I’m leaving the Democratic Party MORE's administration for failing to lead on the issue.

Asked whether the Senate could pass climate change and health care reform this fall, McCain said the White House still hasn't produced a bill and suggested Obama still has yet to reach out to Republicans on the issue.

"It depends on whether the administration has a proposal. That's generally the way we work, but obviously that's not been the case here," McCain said. "It also depends on whether there's a tangible desire for bipartisanship and whether the president decides to lead. I think that some of us have a legitimate desire to say, 'Well, what is your proposal?' to the president."

--J. Taylor Rushing