From Americans United's Wall of Separation blog:

"[Protect Thy Neighbor] hits the ground running today with its first initiative: AU’s Legal Department is sending a letter to every state attorney general in the country as well as every county clerk in the states of Texas and South Dakota reminding them that they have a legal obligation to give wedding licenses and otherwise provide service to all qualified couples, including those who are of the same sex.

This action is necessary for two reasons: One, Texas Attorney General Ken Paxton and South Dakota Attorney General Marty Jackley have deliberately confused the issue by asserting county clerks may have a “religious freedom” right to refuse to service to some couples and two, some clerks have in fact turned away same-sex couples.

AU’s response is blunt: Government officials have no right to deny services to people."