Former Pennsylvania Republican Senator Rick Santorum drew a line in the party sand Thursday between himself and Indiana Republican Governor Mitch Daniels over social issues at CPAC in Washington.

Daniels, who has boasted about his fundraising prowess among possible 2012 contenders, has suggested that Republicans should play up economic conservatism and bench hot-button social issues like abortion and opposition to gay marriage.

Santorum invoked Ronald Reagan's famous description of the party as a three-legged stool dependent on strong economic, foreign policy and social conservatism.

"It's not just the third leg of a stool, ladies and gentlemen, the moral issues, the cultural issues, the social issues, they're the fabric the stool is made from... Those are the issues that matter. Those are the issues that bind us together, and those are the issues that we cannot retreat on," Santorum said before the large crowd.

Santorum also stood out as the only potential 2012 White House hopeful of the day to take questions from the audience -- something former Alaska Governor Sarah Palin is often criticized for refusing to do. Palin is not attending the three-day event.

"Those of you who know me know that I'll answer any question," Santorum said at the opening of his remarks. "Last couple days, that probably wouldn't have been a good idea to answer every question, but I do."

Santorum is expected to announce his candidacy for the Republican nomination in the next month.

Rick Santorum is a Fox News Contributor.

Carl Cameron currently serves as Fox News Channel's (FNC) Washington-based chief political correspondent. He joined FNC in 1996 as a correspondent.