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The campaign will begin Monday, a day before a number of the group's state leagues are targeting lawmakers locally with demonstrations on climate change.

It's unclear which lawmakers the $2 million ad campaign will highlight, but the state leagues are targeting Reps. Robert AderholtRobert AderholtGOP leaders are unified: Firing Mueller a bad idea House urged to ‘go ugly early’ Republicans give Trump's budget the cold shoulder MORE (R-Ala.), Mo BrooksMo BrooksHouse to vote on Kate's Law next week as wall debate heats up Baseball gunman had list of GOP lawmakers: reports Congressional aide: 'If I wanted to live I needed to make a run for it' MORE (R-Colo.), Doug Lamborn (R-Colo.), Mike Coffman (R-Colo.), Scott GarrettScott GarrettHeitkamp breaks with Dems on regulations Business groups silent on Trump's Ex-Im nominee Trump should work with Congress to kill the Export-Import Bank MORE (R-N.J.), Virginia FoxxVirginia FoxxThe Hill's 12:30 Report House urged to ‘go ugly early’ Top Education official resigned over dispute with DeVos: report MORE (R-N.C.), Richard Hudson (R-N.C.), Robert Pittenger (R-N.C.), Robert HurtRobert HurtDemocrat defeats controversial chair of House Wall Street subpanel Republican groups launch final ad blitz in key House battlegrounds Armed protester stands outside Dem's office for 12 hours MORE (R-Va.), Andy Harris (R-Md.) and Darrel Issa (R-Calif.), as well as GOP Sens. Ted CruzTed CruzWill Republicans stand up to the NRA's insurrection rhetoric? Rocky rollout for Senate healthcare bill Overnight Healthcare: Latest on Senate healthcare bill | Four conservatives say they'll oppose | Obama slams bill | Health groups offer scathing criticism MORE and John CornynJohn CornynLawmakers want meeting with Trump administration to take US-Mexico border trade Rocky rollout for Senate healthcare bill The Hill's Whip List: Senate ObamaCare repeal bill MORE of Texas, Sen. Pat Toomey (R-Pa.) and Sen. Ron JohnsonRon JohnsonRocky rollout for Senate healthcare bill Overnight Healthcare: Latest on Senate healthcare bill | Four conservatives say they'll oppose | Obama slams bill | Health groups offer scathing criticism Four Senate conservatives say they oppose ObamaCare repeal bill MORE (R-Wisc.).

According to League spokesman Jeff Gohringer, the television ads will "hold climate change deniers in Congress accountable for their anti-science views and voting records."

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.