Rep. Connie Mack (R-Fla.), a rumored Senate candidate in 2012, focused his speech at CPAC on the threat posed by Venezuela's Hugo Chavez, ripping former Rep. Joe Kennedy (D-Mass.) in the process.

Mack called Kennedy, whose energy company is helping promote efforts by CITGO in the U.S., "a low man with a great name."

Kennedy is the son of former Attorney General Robert Kennedy and nephew of former President John F. Kennedy.

Mack, who heads a House subcommittee on foreign relations, quoted President Kennedy in his attack on the former Democratic congressman.

"President Kennedy said, 'We will pay any price and bear any burden to ensure the survival and success of liberty,'" said Mack. "It is a disgrace that a nephew of the president who spoke those magnificent words ... is the front man in Chavez's oil for influence campaign here in the United States."

Mack also urged a CITGO boycott, telling the crowd he "wouldn't mind if everybody here didn't buy their gas at CITGO."

Mack's speech went well over his allotted time and focused almost entirely on Chavez and Venezuela, criticizing President Obama's dealing with Chavez, who Mack said is cultivating alliances with U.S. enemies while Obama simply stands by.

Mack's biggest applause line came when he called for President Obama to support domestic drilling.