Bill White has shifted from supporting Mitt Romney to President Barack Obama over the issue of gay marriage.

White, who is openly gay and previously donated $25,000 to the Romney campaign, has asked the campaign for a refund.

“I feel that I no longer wish to support your presidential campaign and ask that you please return the maximum contribution that I gave to you last year,” White wrote in a letter addressed to the Romney campaign and obtained by CNN.

In 2008, White was touted by top retired military leaders and some Democrats in Congress to be the next secretary of the Navy. The former president of the Intrepid Sea, Air and Space Museum currently serves as the chairman and CEO of the New York-based consulting firm Constellations Group.

White married his husband Joseph Bryan Eure last October in a ceremony held at the Four Seasons restaurant in New York. Lawyer David Boies, who is representing two gay couples challenging the constitutionality of California's gay marriage ban, Proposition 8, officiated the ceremony.

White, a registered independent, said that he took issue with Romney's address at Christian Liberty University.

“... to a packed stadium of young college students you made the following statement that 'Marriage is only between one man and one woman,'” White wrote. “I believe that you will do as you now say and try to force a constitutional amendment which would attempt to make my own legal and blessed marriage null and void.”

White told Reuters that he does not consider himself an activist “But I am married and that's that. You should be able to marry who you love.”