Who's the amateur?

Newt Gingrich's response to a reporter:

….AP’s Tom Beaumont: “Does this remind you that your background comes from being a Washington insider?”
Gingrich: “It reminds people that I know a great deal about Washington and if you want to change Washington, we just tried four years of amateur ignorance and it didn’t work very well, so having somebody who knows Washington might be a really good thing.”