(CNN) - Pressed about his aggressive campaign against Newt Gingrich, Texas Rep. Ron Paul said he feels responsible to show a different side of the former House speaker to the American public.
"I have to expose him for what he's been doing over the years. That's all we're doing. Trying to present the facts," Paul said to reporters at a town hall event in Des Moines, Iowa.
In the last week, Paul has been a vocal critic of Gingrich, a man he calls a "counterfeit conservative." The Texas congressman has frequently hit the GOP front-runner as a flip-flopper and Washington insider, and in an interview with CNN on Friday, he described Gingrich's new popularity as "bewildering."
Paul's campaign also released a round of negative TV ads against Gingrich in Iowa on Wednesday, which is now set to expand into New Hampshire, the first-in-the-nation primary state.
Paul's attacks follow a surge for Gingrich in the GOP presidential horserace, where he now tops the field in three out of four early voting states, according to a new CNN/ORC International Poll.
On the heels of a Congressional showdown over ways to pay for a payroll tax cut extension, Paul also weighed in Thursday on what he calls the worst debt situation "in the history of the world."
Paul, a former obstetrician, compared Washington spending to a drug addict who fails to recover because he keeps getting fix after fix.
"But, you know, if you don't get off the drugs, if you're an alcoholic, and you're about to ruin your liver, I tell you what, if you don't quit, the patient dies," he said.