Here’s where the candidates who have been challenged on the subject stand on a line of questioning that’s splitting the difference between the political and personal.
Marco Rubio: "If it's somebody in my life that I care for, of course I would," Rubio told Ramos on April 15. "I'm not going to hurt them simply because I disagree with a choice they've made or because I disagree with a decision they've made, or whatever it may be," he continued. "Ultimately, if someone that you care for and is part of your family has decided to move in one direction or another or feels that way because of who they love, you respect that because you love them."
Rubio opposes gay marriage, but said he believes the legality of gay marriage should be decided by individual states, not the judicial system.
Bobby Jindal: The Louisiana governor told CNN he would "absolutely" attend the gay marriage of a loved one. "Sure, if it's somebody I loved and cared for, absolutely," he said to reporters in Iowa.
Jindal, who has not decided on a 2016 run, opposes same-sex marriage. He was a vocal defender of the controversial Indiana religious freedom law that critics claimed would allow discrimination against gay couples.
Scott Walker: Wisconsin's governor has attended a wedding reception for a gay family member, but still believes that marriage should be between a man and a woman, he told MSNBC in New Hampshire on April 19. "That's certainly a personal issue," Walker said.
When asked if he would attend a gay wedding, Walker replied, "That's true even though my position on marriage is still that it's defined between a man and a woman, and I support the constitution of the state. But for someone I love, we’ve been at a reception."
Jeb Bush: Bush, who is not yet an official presidential candidate, told reporters in San Juan, Puerto Rico, on Tuesday that he has never attended a gay marriage, but would be open to it. "¡Claro que sí!" Bush said in Spanish, which translates to "Of course!" or "Certainly!"
Rick Santorum: The former presidential candidate and Pennsylvania senator told conservative talk-radio host Hugh Hewitt he wouldn't attend a gay wedding of a family member or friend. Attending a gay wedding would be a "violation of my faith," Santorum said. "I would love them and support them, but I would not participate in that ceremony."
Ted Cruz: Cruz, who was also questioned by Hewitt, didn't directly answer the question a day after Rubio was asked. "I haven’t faced that circumstance," the Texas Republican said. "I have not had a loved one go to a have a gay wedding."
"But the legal question, I'm a constitutionalist, and under the Constitution from the beginning of this country, marriage has been a question for the states," he added.
John Kasich: Ohio's governor opposes same-sex marriage, but is planning to attend a friend's wedding, he told CNN. "My friend knows how I feel about the issue, but I'm not here to have a war with him. I care about my friend, and so it's pretty simple for me," Kasich said.