On Friday, Rep. Glenn Thompson, a Republican from Pennsylvania, attended his gay son’s wedding.

But earlier in the week, Thompson voted with most of his GOP colleagues against a bill that would protect same-sex marriage rights across the country.

What’s good for his son, apparently, isn’t good enough for anyone else.

47 House Republicans voted in favor of the “Respect for Marriage Act.” The bill, if it passes in the Senate, would simply require all states to respect the marriage laws of other states just as they do with straight couples already. So if a gay couple gets married in one state, they would still be considered legally married in other states even if the Supreme Court overturns Obergefell and a Republican legislature decides to ban same-sex marriage in their state. (The same bill would also protect interracial marriage the same way.) ...