U.S. President-elect Donald Trump arrives to speak during a USA Thank You Tour event at Giant Center in Hershey, Pennsylvania, U.S., December 15, 2016. Lucas Jackson / Reuters

FADA would prohibit the federal government from taking "discriminatory action" against any business or person that discriminates against LGBTQ people. The act distinctly aims to protect the right of all entities to refuse service to LGBTQ people based on two sets of beliefs: "(1) marriage is or should be recognized as the union of one man and one woman, or (2) sexual relations are properly reserved to such a marriage."

Ironically, the

On December 9, Sen. Lee's spokesperson, Conn Carroll, told

"Hopefully November's results will give us the momentum we need to get this done next year," Carroll said. "We do plan to reintroduce FADA next Congress and we welcome Trump's positive words about the bill."

"During oral arguments in Obergfell, President Obama's solicitor general admitted that if a right to same-sex marriage were created, religious institutions, including many Catholic schools, could have their tax exempt status revoked by the IRS," Carroll told NBC Out on Wednesday. "The First Amendment Defense Act was created to make sure that does not happen."

But while Carroll claims "FADA in no way undermines federal or state civil rights laws," it would take away the government's recourse in terms of punishing businesses, institutions or individuals who break civil rights law by discriminating against LGBTQ people.

Jennifer Pizer, Law and Policy Director at Lambda Legal, told NBC Out FADA "invites widespread, devastating discrimination against LGBT people" and is a deeply unconstitutional bill.

"This proposed new law violates both Equal Protection and the Establishment Clause by elevating one set of religious beliefs above all others," Pizer said, "And by targeting LGBT Americans as a group, contrary to settled constitutional law."

Pizer warned that the bill's language also left room for individuals and businesses to discriminate against unwed heterosexual couples and single mothers, because of the clause stating that "sexual relations are properly reserved" to marriage between a man and a woman.

"There cannot be even one iota of doubt that this bill endorses one set of religious beliefs above others, and targets people in same-sex relationships, married or not, as well as unmarried heterosexual couples who live together," Pizer said. "It's an unconstitutional effort to turn the clock back to a time when unmarried mothers had to hide in shame, and LGBT people had to hide, period."

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FADA was first filed in the House and Senate in 2015, but was met with protests from Democrats and resulted in just one House hearing amid concerns that Obama would veto the bill. It is currently co-sponsored by 171 House Republicans and just one Democrat (Daniel Lipinski of Illinois.)

State-level legislation similar to FADA has failed in recent years, usually resulting from lawsuits and nationwide boycotts. When Vice President-elect Mike Pence passed a "religious freedom" bill as governor of Indiana in March 2015, it was met with

Mississippi's

A lawsuit brought by Mississippi religious leaders alleges the state law actually violates religious freedom by determining that religious belief necessitates anti-LGBTQ discrimination. The group of ordained ministers suing the state said in the lawsuit,

Barber v. Bryant is currently at the Fifth Circuit Court of Appeals, after a federal trial court ruled HB 1523 violates the federal Equal Protection and Establishment Clauses. Pizer said the case stands as an example of the legal explosion that would occur in reaction to FADA.

"If Congress were to pass the federal FADA as currently written, and the next president were to sign it into law, I'm confident heads would spin at how fast the constitutional challenges would fly into court," Pizer said, adding "we're likely to have a great many allies because these attempts to misuse religion for discrimination offend enormous numbers of Americans who cherish both religious liberty and equality for all."

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First Amendment Defense Act Would Be 'Devastating' for LGBTQ ...