(CNN) - Grover Norquist, the man behind a high-profile anti-tax pledge, said former Florida Gov. Jeb Bush insulted GOP presidential candidate Mitt Romney on Friday by voicing his opposition to the Norquist-backed pledge.
"He kind of stepped in it a little bit," Norquist said of Bush, who spoke before a House Budget Committee hearing on Friday.
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Bush said, "I ran for office three times. The pledge was presented to me three times. I never signed the pledge. I cut taxes every year I was governor."
He said he would favor a hypothetical Romney and other Republicans have opposed: one dollar of tax increases for ten dollars of spending cuts. "This will prove I am not running for anything," he said.
Norquist called that a mistake, and said it could be because "he's not used to Washington politics." Bush was governor of Florida from 1999 to 2007, and both the son and brother of U.S. presidents.
Norquist suggested it shouldn't disqualify Bush from the GOP vice presidential ticket, though he offered three names he favored: Sen. Rob Portman of Ohio, Louisiana Gov. Bobby Jindall, and Sen. Marco Rubio.
The pledge, which was first drafted in 1986, commits signers to making only decreases or neutral changes to the tax code. It has been signed by 238 current members of the House and 41 Senators, according to Norquist's Americans for Tax Reform.
– CNN's Ashley Killough and Gregory Wallace contributed to this report