Sen. Susan Collins Susan Margaret CollinsGOP short of votes on Trump's controversial Fed pick Congress must save the Postal Service from collapse — our economy depends on it Garcetti: I would have acted sooner if Trump hadn't downplayed virus MORE (R-Maine) is “concerned” about the number of lawsuits President Trump’s nominee to lead the Environmental Protection Agency (EPA) has filed against the agency he may soon run.

Collins is the first Republican senator to come out publicly with concerns about Oklahoma Attorney General Scott Pruitt.

“I am concerned, based on the meeting I had with Scott Pruitt, about the number of times he has sued the very agency that he has now been tapped to lead,” Collins told Maine Public.

Pruitt’s record of repeatedly suing the EPA during President Obama’s tenure is a sticking point for Democrats, who argue it shows that he opposes the agency’s core missions.

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He sued the Obama administration EPA 14 times to get regulations overturned and won a court decision in one case.

Pruitt and his Republican and industry allies see his record of litigation as a top qualification. In his official biography, he calls himself “a leading advocate against the EPA’s activist agenda.”

Collins, meanwhile, takes a moderate position on environmental policy.

She is one of a small handful of Republican lawmakers who support policies to limit greenhouse gas emissions and has voted to preserve Obama’s Clean Power Plan.

The Senate Environment and Public Works Committee is planning to vote Wednesday on confirming Pruitt. After that, the nomination would go to the full Senate for consideration.

Pruitt only needs 51 votes to be confirmed, and Republicans have a 52-seat majority in the Senate.

Sen. Joe Manchin Joseph (Joe) ManchinOVERNIGHT ENERGY: House Democrats tee up vote on climate-focused energy bill next week | EPA reappoints controversial leader to air quality advisory committee | Coronavirus creates delay in Pentagon research for alternative to 'forever chemicals' Senate Democrats demand White House fire controversial head of public lands agency House Democrats tee up vote on climate-focused energy bill next week MORE (D-W.Va.) is the only Democrat to have spoken favorably of Pruitt, although he has not fully committed to voting for the EPA nominee.