Conservative anti-tax activist Grover Norquist says U.S. Saxby Chambliss will be breaking trust with Georgians if he agrees to a debt deal that includes a tax increase.
That pledge was created and promoted by Norquist, who heads Americans for Tax Reform.
For years, that pledge has kept congressional Republicans from supporting new taxes.
Chambliss, Georgia's senior senator, is among several Republicans who say they would consider a tax increase as part of a deal with President Obama.
This week, Chambliss told 13WMAZ's Kenny Burgamy,
"I care more about my country than I do about a 20-year-old pledge."
"If we do it (Norquist's) way then we'll continue in debt, and I just have a disagreement with him about that."
Chambliss is expected to seek a third term in the Senate in 2014, and he conceded that voting for a tax increase could stir up Republican challengers.
"If he plans to vote for higher taxes to pay for Obama-sized government," Norquist wrote, "he should address the people of Georgia and let them know that he plans to break his promise to them."
"The Senator's reference to me is odd," Norquist wrote. "His promise is to the people of Georgia."