Climate advocates plan $11 million ad campaign targeting ‘key senators’

Senate Majority Leader Harry ReidHarry ReidChris Murphy’s profile rises with gun tragedies Republicans are headed for a disappointing end to their year in power Obama's HHS secretary could testify in Menendez trial MORE (D-Nev.) plans to bring a bill to the floor this summer, and is gathering the Senate Democratic caucus Thursday for a meeting to discuss the legislation.

Climate advocates are struggling to keep greenhouse gas limits in the mix as the bill takes shape.