To be perfectly clear, the president said "At a certain point, I've just concluded, that for me, personally, it is important for me to go ahead and affirm that I think same-sex couples should be able to get married."
I'm not sure that I would call this a resolute statement of anything.
On the other hand, the presumptive Republican nominee's response, "I've had the same position I've had since, well, since I ran for office," doesn't exactly stoke warm fuzzies.