[quote]Cite the US law that requires issuing marriage licenses[/quote]Well considering marriage is a state-governed institution, there is no federal law outlining how states should issue marriage licenses. However, under the 14th Amendment, a marriage license that is issued in one state must also be legal in another, and that includes gay marriage licenses. Coupled with the fact that the same amendment is used to determine that states cannot deny certain groups from obtaining marriage licenses, the 14th Amendment remains the answer to your question. And let me remind you that you still didn't answer my question about citing the bible verse.