White House digs into climate push as midterm elections near

President Obama is renewing his focus on climate change, a move that, depending on the viewpoint, either buoys or imperils a clutch of red-state Senate Democrats facing re-election in the November midterm elections.

On the one hand, conservative groups and Republicans say they will be able to more easily tie those Democrats to policies they say are out of step with their constituents. On the other, Democrats and their supporters say the emphasis on climate could draw more of the base to the polls.