South Carolina Senator Jim DeMint said Sunday he could support any of the six candidates attending his Monday forum.

Texas Governor Rick Perry, Minnesota Rep. Michele Bachmann, Texas Rep. Ron Paul, former Godfathers Pizza CEO Herman Cain, former House Speaker Newt Gingrich and former Massachusetts Governor Mitt Romney are set to appear at the Palmetto Freedom Forum sponsored by the American Principles Project.

“There's no one in that group that I couldn't support as our nominee,” DeMint told CNN's Candy Crowley on Sunday. “I'm very open right now; I'm listening to what they say.”

DeMint, a tea party favorite, could boost a candidate's campaign with his endorsement.

Joining DeMint on the panel will be Iowa Representative Steve King and Robert P. George, founder of the American Principles Project and chairman emeritus of the National Organization for Marriage (NOM), the nation's most vociferous opponent of gay marriage.

DeMint and King oppose gay rights.

During a Senate Judiciary Committee in July, King testified in favor of the Defense of Marriage Act (DOMA), which bars federal agencies from recognizing the legal marriages of gay and lesbian couples.

“This [DOMA] is good for families, good for society and good for government,” King testified. He also told the panel that sexual orientation is not an immutable characteristic, suggesting being gay is a choice.

DeMint boycotted this year's annual Conservative Political Action Conference (CPAC) convention because of the inclusion of gay GOP group GOProud. And last year, he stirred controversy when he told a group of conservatives that schools should reject gay and lesbian teachers.

All six of the candidates included in Monday's forum uniformly oppose gay marriage. Two GOP candidates – former Iowa Governor Jon Huntsman and former New Mexico Governor Gary Johnson – support civil unions for gay couples,while Fred Karger, who is gay, supports full marriage. Texas Rep. Ron Paul has said he's opposed to gay couples marrying but he does not believe government should be involved in regulating relationships.