Just days after officially launching his second presidential campaign, former Sen. Rick Santorum announced that he would fight against a Supreme Court ruling that legalized same-sex marriage if he became president.

"I think it's important to understand that the Supreme Court doesn't have the final word. It has its word. Its word has validity. But it's important for Congress and the president, frankly, to push back when the Supreme Court gets it wrong," Santorum said when asked whether he would accept a ruling in favor of gay marriage during an interview on NBC's "Meet the Press" Sunday.

Santorum, who lost the Republican presidential nomination to Mitt Romney in 2012, went on to say that the country is not "bound by what nine people say in perpetuity."

He also pointed out that he has continued to fight against the Supreme Court's decision in Roe v. Wade, which granted women the right to an abortion in 1973.

"Roe versus Wade was decided 30 some years ago, and I continue to fight that, because I think the court got it wrong. And I think if the court decides this case in error, I will continue to fight, as we have on the issue of life," the 57-year-old father of seven said.

When "Meet The Press" host Chuck Todd asked if he thinks states should ignore the ruling if the Supreme Court does legalize same-sex marriage, Santorum replied, "I don't advocate civil disobedience. I do advocate the role of an informed citizen to try to overturn when a court makes a mistake and gets an issue wrong."

Although Santorum was the winner up in the 2012 GOP presidential race, he faces an uphill battle during his 2016 run. He has stiff competition from popular Republican candidates like Sen. Marco Rubio, Sen. Ted Cruz and Sen. Rand Paul.

Watch Rick Santorum's interview below.