Republicans, conservatives who support gay marriage

Former Vice President Dick Cheney, whose daughter married her partner in 2011, endorsed gay marriage in 2011. (March 12, 2007)

Former National Republican Congressional Committee executive director Sally Vastola (Oct. 23, 2006)

Massachusetts Republican candidate for U.S. Senate Dan Winslow (March 6, 2013)

Former Treasury Undersecretary Robert Steel (Nov. 2, 2007)

David A. Stockman, a former Reagan budget director (Aug. 25, 2003)

Former U.S. Rep. Christoper Shays of Connecticut (Oct. 29, 2008)

Wyoming state Rep. Dan Zwonitzer (Jan. 31, 2007)

Former Mass. Senate Minority Leader Richard Tisei (Sept. 22, 2009)

Former National Security Council staff member Faryar Shirzad (April 27, 2010)

State Representative B.J. Nikkel of Loveland, Colo. (March 29, 2011)

Steve Schmidt, former senior adviser to John McCain during his presidential campaign (Aug. 25, 2008)

Former U.S. Rep. Connie Morella of Maryland (March 7, 2002)

Former Massachusetts Gov. William Weld (Oct. 24, 2008)

Former U.S. Rep. Nancy Johnson, of Connecticut (Feb. 15, 1995)

Former Federal Communications Commission Chairman Kevin Martin (Oct. 11, 2007)

Rhode Island Gov. Lincoln Chafee, a former Republican U.S. senator, signed an executive order in 2012 that ordered all state agencies to recognize gay marriages performed elsewhere and to afford those couples many of the same rights and benefits that heterosexual couples get. (Jan. 15, 2013)

Former U.S. Rep. James Kolbe of Arizona (June 4, 2001)

Former Secretary of State Colin Powell, shown here with President Barack Obama in the Oval Office at the White House in Washington, told CNN in May 2012 that he supports gay marriage. (Dec. 1, 2010)

Republican strategist Mark McKinnon (May 31, 2012)

Former U.S. Commerce Secretary Carlos Gutierrez (Nov. 14, 2006)

New York City Mayor Michael Bloomberg supports gay marriage and has donated money on same-sex marriage campaigns in Maine, Minnesota and Washington state. (Jan. 18, 2013)

Former Treasury Department General Counsel David Aufhauser (Oct. 14, 2003)

New York Sen. Mark Grisanti (R-Buffalo) (Sept. 13, 2012)

New Hampshire Rep. Charles Bass (Sept. 18, 2012)

Former Melrose, Mass., Mayor Patrick Guerriero (Dec. 11, 2003)

Ben Ginsberg, campaign counsel for Bush-Cheney and Mitt Romney (June 23, 2012)

Former South Dakota Sen. Larry Pressler (April 29, 2010)

Meghan O'Sullivan , former deputy national security adviser (Mary 31, 2007)

Tom Ridge, former Pennsylvania governor and the first secretary of homeland security (April 17, 2012)

Former U.S. Representative Susan Molinari of New York (Jan. 20, 2013)

Neel Kashkari, former interim assistant secretary for financial stabilization at the Treasury Department (March 11, 2009)

Former FCC Chairman Michael Powell (Jan. 6, 2005)

Former U.S. Deputy Secretary of Energy Jeffrey Kupfer (Aug. 6, 2008)

Former Under Secretary for Economic, Energy and Agricultural Affairs Reuben Jeffery III (Aug. 27, 2008)

Beth Myers, senior adviser to Republican presidential candidate and former Massachusetts Gov. Mitt Romney (Aug. 2, 2012)

U.S. Rep. Ileana Ros-Lehtinen of Florida, chairwoman of the House Foreign Affairs Committee (May 24, 2012)

U.S. Rep. Richard Hanna of New York (March 22, 2012)

Juleanna Glover, press secretary to former Vice President Dick Cheney (June 24, 2010)

Former legal adviser to the U.S. State Department John Bellinger (May 5, 2005)

David Chavern, chief operating officer for the U.S. Chamber of Commerce (Aug. 31, 2011)

R. Clarke Cooper, former U.S. alternative representative to the United Nations Security Council (Oct. 2, 2010)

Douglas Holtz-Eakin, former member of the Financial Crisis Inquiry Commission. He served as chief economic policy adviser to Sen. John McCain in his 2008 presidential campaign (Sept. 1, 2010)

Former U.S. National Security Adviser Stephen Hadley (Oct. 27, 2008)

Former U.S. Deputy Secretary of Defense Paul Wolfowitz (May 17, 2007)

Frances Townsend, former assistant to President George W. Bush for homeland security and counterterrorism (Nov. 19, 2009)

David Frum, columnist and former speechwriter for President George W. Bush (March 15, 2009)

Actor and director Clint Eastwood (Sept. 19, 2012)

Former Chief of Staff for President Ronald Reagan Ken Duberstein (Oct. 30, 2005)

Mary Cheney, daughter of former Vice President Dick Cheney (May 14, 2006)

Alex Castellanos, senior adviser to Mitt Romney (March 5, 2007)

Former U.S. Rep. Deborah Pryce of Ohio (Oct. 19, 2006)

Former Massachusetts acting Gov. Jane Swift (Feb. 20, 2002)

Former New Mexico Gov. Gary Johnson (Sept. 21, 2011)

Former U.S. Deputy Attorney General James Comey (May 3, 2007s)

Former Environmental Protection Agency Chief and ex-New Jersey Gov. Christie Todd Whitman (June 25, 2007)

Former U.S. Rep. Mary Bono Mack of California (Jan. 5, 2013)

Former California Republican gubernatorial candidate and ex-eBay CEO Meg Whitman (Nov. 10, 2010)

Republican National Committee Chairman Ken Mehlman (Jan. 20, 2006)

Republican presidential candidate, former Utah Gov. Jon Huntsman, speaking at a rally in West Valley City, Utah. Huntsman has come out in support of same-sex marriages. (July 16, 2011)

Sen. Rob Portman, R-Ohio (July 30, 2012)