Donald Trump signed the U.S.-Mexico-Canada-Agreement (USMCA) on Friday at the G-20 summit in Argentina. The agreement contains a protections provision, insisted upon by Canadian Prime Minister Justin Trudeau, that ensures LGBTQ workers are protected from discrimination.

A letter, signed by a veritable ‘who’s who’ of anti-LGBTQ Republicans, had urged Trump to reject the agreement unless the protections for LGBTQ people were removed, saying that “a trade agreement is no place for the adoption of social policy” and said the U.S. “has the right to decide when, whether and how to tackle issues of civil rights, protected classes and workplace rights.”

Added the letter: “It is especially inappropriate and insulting to our sovereignty to needlessly submit to social policies which the United States Congress has so far explicitly refused to accept.”

The letter argued that keeping the provision would not allow the administration to rescind Obama-era protections for LGBTQ workers that Republicans have been working diligently to trash.