Voters headed to the polls in Maryland, Wisconsin and the District of Columbia Tuesday to cast their ballots for who they think can defeat President Obama in November.
CBS News projects Mitt Romney has won all three primaries. He now has more than half the delegates needed to secure the republican presidential nomination.
Rick Santorum wasn't even on the ballot in D.C. He choose to make his stand in Wisconsin.
Newt Gingrich didn't hold any campaign events, while Ron Paul appeared at a town hall in California.
The next primaries are not for another three weeks.