U.S. President Barack Obama speaks during his last rally the night before the general election November 5, 2012 in Des Moines, Iowa. The rally was held just outside Obama's first headquarters from the 2008 campaign, where his first march to the White House started. Obama and his opponent, Republican presidential nominee and former Massachusetts Gov. Mitt Romney are stumping from one 'swing state' to the next in a last-minute rush to persuade undecided voters. (Photo by Chip Somodevilla/Getty Images)
Republican presidential candidate, former Massachusetts Gov. Mitt Romney greets workers at call center on November 6, 2012 in Pittsburgh, Pennsylvania. The presidential race remains tight as Americans are heading to the polls to cast their ballots. (Photo by Justin Sullivan/Getty Images)
Freshman Republican Andy Harris poses with his family after learning it had been announced he won house district.
Sen. Ben Cardin (File)
Andy Harris interviewed by ABC2 News after being elected to represent Maryland House District 1.
Supporters of U.S. President Barack Obama cheer after networks project Obama as reelected during the Obama Election Night watch party at McCormick Place November 6, 2012 in Chicago, Illinois. Networks project Obama has won reelection against Republican candidate, former Massachusetts Governor Mitt Romney. (Photo by Chip Somodevilla/Getty Images)
Voters at C. Milton Wright High School in Bel Air.