Washington (CNN) - Sen. Jim DeMint, R-South Carolina, proposed a constitutional amendment last year that would limit senators to serving two terms in Washington.
On Tuesday, he pledged to live up to that standard if he wins re-election in November.
"I haven't made any public promises about what I'm going to do in the Senate, but my intent is to serve no more than two terms," DeMint told CN2 News in Rock Hill, South Carolina.
DeMint, 58, limited himself to three terms when he served in the House from 1999 to 2005. He was asked if he intends to make a similar commitment as a senator.
"If the people in South Carolina give me a second term, and I am on the ballot this year, right now my plans are to make that my last and to give somebody else a chance at it," he said.
Vic Rawl, a Charleston County Councilman, is DeMint's likely Democratic opponent.
Updated: 7:05 p.m.