Florida Senator Bill Nelson on Thursday became the latest Democratic senator to endorse gay marriage.

“It is generally accepted in American law and U.S. society today ' … that all Men are created equal, that they are endowed by their Creator with certain unalienable Rights, that among these are Life, Liberty and the Pursuit of Happiness,'” Nelson said in a statement given to the Tampa Bay Times. “I believe that. The civil rights and responsibilities for one must pertain to all.”

“Thus, to discriminate against one class and not another is wrong for me. If we are endowed by our Creator with rights, then why shouldn't those be attainable by Gays and Lesbians?”

“Simply put, if The Lord made homosexuals as well as heterosexuals, why should I discriminate against their civil marriage? I shouldn't, and I won't.”

“So I will add my name to the petition of senators asking the Supreme Court to declare the law that prohibits gay marriage unconstitutional.”

Nelson reiterated his opposition to marriage equality as late as last week.

“I've always stood up for the civil rights of all people, including civil unions,” Nelson told reporters in Tallahassee. “My personal preference is that marriage is between a man and a woman.”

Nelson joins a growing list of U.S. senators who have recently reversed course on the issue, including two Republicans, Ohio Senator Rob Portman and Illinois Senator Mark Kirk, and Democratic Senators Claire McCaskill of Missouri, Mark Warner of Virginia, Mark Begich of Alaska, Jon Tester of Montana, Jay Rockefeller of West Virginia, Kay Hagan of North Carolina, Tom Carper of Delaware and Bob Casey of Pennsylvania.

Only six Democratic senators remain opposed to marriage equality. They are: Mark Pryor of Arkansas, Joe Donnelly of Indiana, Joe Manchin of West Virginia, Mary Landrieu of Louisiana, Heidi Heitkamp of North Dakota and Tim Johnson of South Dakota.