Environmentalist billionaire Tom Steyer, a vocal opponent of the Keystone XL pipeline – and any Democrats who support it – hosted a $2,700-per-person fundraiser for Hillary Clinton at his San Francisco home, riling some green activists, Politico reports. Though Clinton has avoided public comment while the Obama administration weighs the fate of the pipeline, as secretary of state, she presided over studies that said the pipeline would pose few environmental risks – and even said in 2010 the administration was "inclined" to support it. "I am not surprised that he would want to get on-board the Clinton train, but I'm...