But are the tea party Republicans really that different from the so-called establishment? According to a report from Club for Growth, an organization advocating conservative economic principles, there's not much of a difference.
"We're not interested in the rhetoric of elected officials," said Barney Keller, a spokesman for the club. "We're interested in the actions they take as members of Congress."
Calling it "disappointing," Keller added, "There's essentially no difference in the voting patterns."