LA Times: One of President Obama's wealthiest supporters is pledging to spend at least $50 million in a bid to make climate change the central issue in hotly contested elections in New Hampshire, Florida, Michigan and a handful of other battleground states. A group run by California billionaire Tom Steyer unveiled plans to aggressively target Republicans in seven states who have been skeptics of global warming. Among the political figures the group plans to target is Florida Gov. Rick Scott and former Massachusetts...