Speaking to a room full of gun rights advocates at the Londonderry Fish & Game Club, Paul said that while the concept of having a multinational body to "discuss diplomacy" isn't necessarily a bad one, he objects to the current structure, in which the United States has to foot "a huge chunk" of the U.N.'s bill.

"I dislike paying for something that two-bit Third World countries with no freedom attack us and complain about the United States," Paul said. "There's a lot of reasons why I don't like the U.N., and I think I'd be happy to dissolve it."

The Kentucky senator's swing through the first-in-the-nation primary state came a day after The Washington Post reported that Paul has hired a campaign manager for his now all-but certain White House run.