Santorum Wins the Tri-Fecta in Minnesota, Missouri, Colorado

What does it say about Romney's electability? If Romney can't win in the mid-west, might as well give the presidency back to Obama in November.

(CBS News)   DENVER -- It took one night for Rick Santorum to become a player again in the Republican presidential race.

The former Pennsylvania senator came out on top in the voting in all three contests Tuesday night, including an unexpected five-point victory in Colorado's caucuses. Santorum also won the Minnesota caucuses, by an 18-point margin, and he won by 30 points in the Missouri primary.

Santorum moves on without any new delegates, but with plenty of momentum.

For everyone who flat-out declared the GOP battle a two-man race between Mitt Romney and Newt Gingrich, voters in three states Tuesday night said, "Not so fast." Rick Santorum pulled off huge wins in Missouri, Minnesota and, incredibly, Colorado -- a state Romney was supposed to have locked up.

"Conservatism is alive and well in Missouri and Minnesota," Santorum told a cheering crowd in Missouri.