Sen. Jim DeMint (R-S.C.) said Monday that he is "less confident" that his party can stop the Democrats' healthcare reform bill from passing.

The Associated Press reported that DeMint added that he still believes the healthcare bill will be President Barack Obama's "Waterloo."

The conservative senator appeared at a fundraiser for Senate candidate Marco Rubio in the Palmetto State. His announcement came as the House Budget Committee passed a series of fixes to the healthcare reform legislation 21-16, moving the process closer to a final vote. 

Last year, DeMint predicted that the healthcare overhaul would "break" the president.

“If we’re able to stop Obama on this, it will be his Waterloo, it will break him,” he said.

At the Conservative Political Action Conference in Washington last month, DeMint said that the Republicans had won "Waterloo."

Without the support of grassroots GOPers, the senator said, “I wouldn’t have the strength to show up at Waterloo, much less win the battle.”

Even though DeMint said he was "less confident" a Republican aide appeared unfazed.

"Yet another helpful attempt to snatch defeat from the jaws of victory," was how he described the quote.