The likelihood of climate change legislation making it to the Senate floor this year may be in doubt, but Foreign Relations Chairman John Kerry (D-Mass.) vowed Thursday he would press on with negotiations in order to keep the issue ripe for next year. “I can’t tell you exactly when we’re going to have a vote, but we’re serious about this,— Kerry said. Likewise, Commerce, Science and Transportation Chairman Jay Rockefeller (D-W.Va.), whose panel shares jurisdiction over climate change legislation, said he does not expect to mark up a bill this year. Kerry will attend President Barack Obama’s speech on climate change in Boston on Friday and is scheduled to meet Monday with Sen. Lindsey Graham (R-S.C.) in a continued effort to woo the moderate Republican to support a climate change bill. The bipartisan duo co-wrote a New York Times opinion piece last week, in which they announced, “We are also convinced that we have found … a framework for climate legislation to pass Congress.—Kerry is co-author of a sweeping climate change bill along with Environment and Public Works Chairman Barbara Boxer (D-Calif.). Boxer’s panel will host several Obama Cabinet secretaries next week for a series of hearings on climate change. Boxer has said she will schedule a markup after next week’s hearings.