The man widely considered to be a front-runner in the GOP race for the White House in 2016 still doesn't support same-sex marriage, but he says he will respect laws that embrace it.
December 30 2014 1:28 PM ET
As the 2016 race heats up, voters will want to know where the Republican Party stands on marriage.
December 02 2014 4:16 PM ET
Portman, the first Republican U.S. senator to endorse marriage equality, says he'll run for reelection to the Senate instead.