The Senate was headed into another all-nighter Monday as 26 Democrats who call themselves the “climate caucus” planned to speak nonstop about climate change from about 6:30 p.m. until 9 a.m. Tuesday. The talkathon is the latest effort by the group, which is working in concert with a parallel House caucus, to elevate the issue of global warming. The members of the climate caucus say their objective is to raise the urgency of global warming and build toward a time in the coming years when the political landscape may have shifted enough that a bill could pass Congress. new york times