USA Today: Billionaire environmentalist Tom Steyer's political aides unveiled a campaign Monday to target the 2016 Republican presidential field on climate-change issues in battleground states.
At the center of Steyer's strategy: linking the candidates to the billionaire industrialists Charles and David Koch, whose network has committed to spend nearly $900 million to advance its free-market agenda before the 2016 presidential election.
"The Kochs and their allies are creating the new Koch Republican...