Washington (CNN) – Mitt Romney, who has racked up thousands of frequent flyer miles over the last year assisting Republican candidates, will make perhaps his most high-profile stop of the 2010 election cycle later this month when he travels to South Dakota to raise money for Sen. John Thune.

 

Romney will headline a fundraiser for Thune - another telegenic Republican on the list of potential 2012 White House candidates - at a Holiday Inn in Sioux Falls on Feb. 19, a Romney aide told CNN.

 

With a flurry of campaign stops and financial assistance, Romney put his stamp on the three biggest GOP victories of the last year: the Virginia and New Jersey governors races and the special Senate election in Massachusetts.