ROCK HILL, S.C. — Kentucky Sen. Rand Paul hammered Hillary Clinton for her hawkish foreign policy Friday evening, less than an hour before the former secretary of state was scheduled to arrive at Winthrop University for the "First in the South" Democratic presidential forum.

"I think Hillary Clinton is a neocon," the GOP hopeful told MSNBC's Chris Matthews.

"She supported the war in Iraq, in Afghanistan," Paul said of the presumptive Democratic nominee.

He added, "If Hillary Clinton is president, we will be back at war in the Middle East."

The Kentucky senator also took jabs at one of his Republican rivals, Florida Sen. Marco Rubio.

Paul said Rubio "agrees with Clinton" on foreign policy and indirectly accused him and other Republican hopefuls of being "naive" in their understanding of foreign affairs.

Before joining MSNBC to weigh in on Clinton and his opponents, Paul spent the day courting voters in the Palmetto State. The notoriously dovish senator currently earns just 2 percent support among Republican voters in South Carolina, according to the latest RealClearPolitics polling average. He ranks 10th in the Washington Examiner's power rankings.