Rep. Don Bacon of Nebraska in Las Vegas in October 2023

Scrutiny of the massive 1,037-page "One Big Beautiful Bill Act" is now intensifying, with more than a dozen House Republicans who voted for its passage now urging their counterparts in the Senate to strip specific language from the legislation.

NBC News' Sahil Kapur reported Friday that 13 Republicans who voted for the bill in May have sent a letter to Senate Republican leadership asking them to remove a provision in the legislation pertaining to clean energy projects in their districts. The letter, which was chiefly written by Reps. Jen Kiggans (R-Va.) and Brian Fitzpatrick (R-Pa.), said signatories were "deeply concerned" about provisions that would "abruptly terminate several credits" that had only recently been enacted. Other Republicans that signed the letter include Reps. Mark Amodei (R-Nev.), Don Bacon (R-Neb.), Rob Bresnahan (R-Pa.), Juan Ciscomani (R-Ariz.), Gabe Evans (R-Colo.), Andrew Garbarino (R-N.Y.), Thomas Kean (R-N.J.), Young Kim (R-Calif.), Nick LaLota (R-N.Y.), Michael Lawler (R-N.Y.) and David Valadao (R-Calif.)

Kiggans' letter specifically complained about "highly restrictive" language preventing projects from moving forward due to concern about companies making clean energy investments in the U.S. having a supply chain that involves China. She also said the phasing out of certain clean energy credits would cause "significant disruption to projects under development."

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The group of Republicans behind the letter also asked senators to address the bill's language halting the transferability of energy tax credits, saying that it "ensures affordable electricity for American families and provides certainty for developers." The letter pointed to ongoing projects in the "nuclear, manufacturing, biofuels and critical minerals" fields that signatories hoped could continue.

"Our position has always been that the energy tax code should be modernized in a way that promotes fiscal responsibility and business certainty," the letter read. "Fully realizing that balance requires improvements to the House-passed version of H.R. 1, the One Big Beautiful Bill Act."

Those Republicans may have a difficult road ahead should the bill pass the Senate and make it back to their own chamber for review. According to Kapur, Rep. Chip Roy (R-Texas), who is a member of the far-right House Freedom Caucus, has said that if any clean energy credits from former President Joe Biden's Inflation Reduction Act are put back into the bill, he would oppose it.

"Those God-forsaken subsidies are killing our energy, killing our grid, making us weaker, destroying our landscape, undermining our freedom. I'm not going to have it," Roy said. "So you do what you want to do in the Senate, House of Lords, have your fun. But if you mess up the Inflation Reduction Act, Green New Scam subsidies, I ain't voting for that bill."

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