It's another victory for Mitt Romney.
The GOP presidential front-runner easily won Tuesday's primary in Washington, D.C. Chief rival Rick Santorum wasn't on the ballot.
Romney also won the Maryland primary and was looking to sweep all three of Tuesday's contests. Wisconsin also was voting.
The former Massachusetts governor is on pace to clinch the party's nomination in June if not before.
Contrast: David Cameron Suspends Vacation Over Foley Killing; Obama Heads Back To Vineyard | Christine Rousselle