President Barack Obama is presented with a Dallas Mavericks team basketball jersey from Dirk Nowitzki as he honored the 2011 NBA basketball champions Dallas Mavericks, Monday, Jan., 9, 2012, in the East Room of the White House in Washington. (AP Photo/Pablo Martinez Monsivais)
Former Massachusetts Gov. Mitt Romney (left) gets the endorsement of Sen. John McCain in his White House bid during a town-hall meeting in Manchester, N.H., on Wednesday, Jan. 4, 2012. (Rod Lamkey Jr./The Washington Times)
President William Howard Taft was the heaviest of American presidents and had a 54-inch waist, but he was elected in 1908 and subsequently installed an extra-large bathtub in the White House to little fanfare. More than a century later, can a heavy-set candidate win?
**FILE** Demonstrators outside the White House march in November with a replica of a pipeline during a protest of the planned Keystone XL pipeline that would bring tar sands oil from Canada to Texas. (Associated Press)
**FILE** Canadian Prime Minister Stephen Harper (left) listens as President Obama speaks following a meeting at the White House in Washington on Dec. 7, 2011. President Obama warned congressional Republicans that he would reject any effort to tie extraneous issues to an extension of the payroll tax cut, including the approval of an oil pipeline between the U.S. and Canada. (Associated Press/The Canadian Press)
In this image released by the White House, Secretary of State Hillary Rodham Clinton, President Barack Obama and Vice President Joe Biden, along with with members of the national security team, receive an update on the mission against Osama bin Laden in the Situation Room of the White House, Sunday, May 1, 2011. (AP Photo/The White House, Pete Souza)
President Barack Obama speaks during a news conference in the South Court Auditorium at the White House complex, Thursday, Dec. 22, 2011, in Washington. The president was flanked at the White House by several people who commented on Twitter about how they would be impacted if the tax cuts were not extended. (AP Photo/Carolyn Kaster)
The presidential dollar coin has been sacrificed to cost-cutting needs. The White House said Tuesday it is stopping nearly all production of the coins, which carry the likeness of every deceased president. The lack of demand has resulted in nearly 1.4 billion coins, or 40 percent of those produced, being returned to the Federal Reserve, which costs money. (Associated Press)