Responding to President Barack Obama's Wednesday announcement in support of gay marriage, Mitt Romney reiterated his opposition.

Obama told ABC News' Robin Roberts: “I've 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.”

The president had previously said he supported civil unions and was “evolving” on marriage for gay couples.

At a press conference in Oklahoma, presumed GOP nominee Romney reacted to Obama's historic endorsement.

“My view is that marriage itself is a relationship between a man and a woman, and that's my own preference. I know other people have differing views,” said Romney.

When asked if he thought Obama had flip-flopped on the issue, Romney calmly responded: “You're a better judge of that than I.”

“If that's the case,” he added, “you'll be able to make that determination on your own.” (The video is embedded in the right panel of this page. Visit our video library for more videos.)