Mitt Romney won Super Tuesday's grand prize, the Ohio presidential primary, beating out Rick Santorum in a hard-fought battle for the Rust Belt state's 66 delegates.
The victory was Romney's fifth of the night, and promised to give him the lion's share of delegates overall after 10 states went to the polls Tuesday. The win should cement his status as the man to beat in the Republican presidential contest.
Santorum's victories of the night were Oklahoma, North Dakota and Tennessee; Newt Gingrich won his home state of Georgia. Results in the final state that voted on Super Tuesday, Alaska, are due later this morning.