A majority of Republicans — including 54 percent of self-described conservative Republicans — believe the world’s climate is changing and that mankind plays some role in the change, according to a new survey conducted by a trio of prominent Republican pollsters. The results echo a number of other recent surveys concluding that, despite the talk of many of the party’s candidates, a significant number of Republicans and independent voters are inclined to support candidates who would back some form of climate action. It may also point to a problem facing Republicans seeking their party’s presidential nomination: The activists who crowd town hall meetings and Republican presidential caucuses and primaries might not reflect the broader attitude of even the Republican electorate. […]