I'd be impressed if they merely drop the constitutional amendment from their platform.
As I discussed in the other thread, I believe the only way us Americans can preserve the sanctity of marriage is to pass a Federal Marriage Amendment. This will stop activist judges from redefining the institution for all of America
If the Republican Party goes this route, they have surrendered the culture wars
I would rather them surrender the culture wars now than have them keep losing the culture wars for the next three cycles.