Washington D.C. residents exit a polling place.
AFP/Getty Images
2 of 12
Supporters of Republican presidential candidate, former Pennsylvania Sen. Rick Santorum, listen as he speaks during a rally at the Four Points Sheraton Hotel in Mars, Pennsylvania.
Getty Images
3 of 12
An election worker puts up a clock above voting booths in Saukville Wisconsin.
EPA
4 of 12
Deborah Edattel, a volunteer with the Romney campaign, left, hands a flyer to Preet Kang, after she voted in the Republican presidential primary at Eastern Market in Washington.
AP
5 of 12
Voters cast their ballot at a polling place during a primary election in Frederick, Md.
AP
6 of 12
A woman casts her ballot as voters take to the polls for the U.S. Republican presidential primary in Menomonee Falls, Wisconsin.
Reuters
7 of 12
Supporters of Republican Presidential candidate, former Massachusetts Gov. Mitt Romney, hold signs during a campaign event at Cousins Subs in Waukesha, Wisconsin.
Getty Images
8 of 12
Voters cast ballots at a polling place in Waukesha, Wisconsin.
Getty Images
9 of 12
Genevieve Archer, 8 and Nathaniel Archer, 7, from Butler, Penn. wait for U.S. Republican presidential candidate and former U.S. Senator Rick Santorum to arrive at his Wisconsin and Maryland primary night rally in Mars, Pennsylvania.
Reuters
10 of 12
Sample ballots from digital voting machines are taped to a window during the presidential primary election at Saints Peter & Paul Antiochian Orthodox Christian Church in Potomac, Md.
Getty Images
11 of 12
‘I Voted’ stickers are seen on a table at a polling station on presidential primary day in Bethesda, Maryland.
EPA
12 of 12
Nicole Newberry (C) casts her vote with her children Colin (L) and Liam, at a polling place in Pewaukee, Wisconsin.
Getty Images
