Reuters: If a climate change bill makes it to the U.S. Senate floor for a vote this year — and there are doubts — its passage will depend partly on conflicting pressures lawmakers face in their home states. Attracting support from moderate Democrats, along with at least a few Republicans, in some of those states is considered essential. Here is a look at some of the main issues and players: MONTANA — COAL, WIND AND GLACIERS Montana holds some of the largest coal …