12/22/2011 11:19 am ET Updated Dec 22, 2011

Newt Gingrich: Ron Paul's Political Base Is Made Of 'People Who Want To Legalize Drugs'

Republican presidential candidate Newt Gingrich slammed rival Ron Paul when he claimed Paul's political base is made of "people who want to legalize drugs."

Gingrich hurled the criticism in a radio interview Tuesday, even after repeatedly promising to keep his campaign "positive." The former House Speaker hit Paul not only for his volunteer base, but also for his views on 9/11 and his non-confrontational policy on Iran.

"This is a guy who basically says, if the United States were only nice, it wouldn't have had 9/11," Gingrich said. "He doesn't want to blame the bad guys."

"He dismisses the danger of an Iranian nuclear weapon and seems to be indifferent to the idea that Israel could be wiped out," Gingrich continued. "And as I said, I think the key to his volunteer base is people who want to legalize drugs."

Paul has dealt with daily hits from his rivals since seeing a bump in the polls ahead of the Iowa caucuses. Michele Bachmann recently said it would be "dangerous" for Paul to become president, and Perry hit Paul for "still birthing earmarks as we speak."

Gingrich's campaign has taken on an increasingly angry tone since he made the promise to stay "positive." HuffPost's Jon Ward reports that while campaigning in Iowa, Gingrich has repeatedly blasted his opponents for their negative ads and claimed "they ought to be ashamed" for their attacks against him.