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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 AderholtTrump launches all-out assault on Mueller probe Republicans rally around Sessions after Trump criticism GOP leaders are unified: Firing Mueller a bad idea MORE (R-Ala.), Mo BrooksMo BrooksTrump touts endorsement of second-place finisher in Alabama primary Moore, Strange advance in Alabama GOP primary Alabama GOP Senate primary: live results MORE (R-Colo.), Doug Lamborn (R-Colo.), Mike Coffman (R-Colo.), Scott GarrettScott GarrettConservative groups urge Trump to stick with Ex-Im Bank nominee Can the Washington swamp defeat Trump's nominee to run the Export-Import Bank? Overnight Finance: House votes to repeal arbitration rule | Yellen, Cohn on Trump's list for Fed chief | House passes Russia sanctions deal | GOP centrists push back on border wall funding MORE (R-N.J.), Virginia FoxxVirginia FoxxAmerica’s workers, job creators need the Save Local Business Act DeVos abandons student loan servicing overhaul House Republican offers bill to reverse controversial labor rule 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 CruzThe media couldn't be more blatant in distorting Trump's words on Charlottesville Curtis wins GOP primary for House seat vacated by Jason Chaffetz Kimmel: Let’s make Trump a king so he has no power MORE and John CornynJohn CornynImmigration battlefield widens for Trump, GOP Congressional investigations — not just special counsels — strengthen our democracy Wrath of right falls on Google MORE of Texas, Sen. Pat Toomey (R-Pa.) and Sen. Ron JohnsonRon JohnsonCEOs revolt against Trump over Charlottesville GOP senator: Trump hasn't 'changed much' since campaign Senators push for possible FCC enforcement over Lifeline fraud 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.