"Congressman Coffman is so extreme he sides with Big Oil," the narrator says in the ad targeting Coffman.
The new ads are part of a $2 million campaign LCV launched last week targeting climate change skeptics. They're also hitting Sen. Ron Johnson (R-Wis.) with television ads.
Though the ads are backed by the group's advocacy arm, rather than its PAC, it believes targeting climate change skeptics in Congress could be a winning argument in 2014.
Last election cycle, the group launched a $1.5 million effort to defeat what they called the "Flat Earth Five," five lawmakers who were skeptical of climate change science. All but one were defeated.