Rick Santorum's victories in a trio of state nominating contests Tuesday show that the Republican presidential nomination is still up for grabs, Rep. Michele Bachmann (R-Minn.) said.

"I think what we saw is that the voters haven't made up their mind yet on who the Republican nominee should be," Bachmann said according to CNN.

Santorum won all three contests on Tuesday in Colorado, Minnesota and Missouri.  Mitt Romney had been the front-runner prior to Tuesday. Before the results were in, Romney's campaign worked to tamp down expectations.

Earlier on Wednesday Santorum said he had raised $250,000 in one night as a result of the three victories.