USA Today: Billionaire environmental activist Tom Steyer will target Republicans in seven Senate and governors' races this year, as he pushes to make climate change a top issue in November's elections, his political aides announced Wednesday.
His campaign -- which will include television ads and on-the-ground efforts to persuade women, young adults and minorities to vote in traditionally low-turnout midterm elections -- will hit Republicans in competitive Senate contests in Colorado, Iowa, Michigan and New...