Barack Obama

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President Barack Obama and first lady Michelle Obama walk from Marine One with Col. David Almand and his wife Cathy to board Air Force One, Wednesday, May 14, 2014, at Andrews Air Force Base, Md., en route to Tarrytown, N.Y., where he will speak about the need for a 21st Century Transportation Infrastructure. (AP Photo)

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President Barack Obama and first lady Michelle Obama walk from Marine One with Col. David Almand and his wife Cathy to board Air Force One, Wednesday, May 14, 2014, at Andrews Air Force Base, Md., en route to Tarrytown, N.Y., where he will speak about the need for a 21st Century Transportation Infrastructure.. (AP Photo/Jose Luis Magana)

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A woman takes a stroll with her child along the Westchester Riverwalk just north of the Tappan Zee Bridge, Tuesday, May 13, 2014, in Tarrytown, N.Y. On Wednesday, President Barack Obama plans to speak by the bridge just north of New York City to press his case that a key federal government fund used to pay for the nation's roads, bridges and ports is running dry and that the economy would be damaged if it is not replenished. (AP Photo/Julie Jacobson)

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A Metro North train streaks along the Hudson River just south of the Tappan Zee Bridge, Tuesday, May 13, 2014, in Tarrytown, N.Y. On Wednesday, President Barack Obama plans to speak by the bridge just north of New York City to press his case that a key federal government fund used to pay for the nation's roads, bridges and ports is running dry and that the economy would be damaged if it is not replenished. (AP Photo/Julie Jacobson)

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A boat ferries construction workers to and from the construction site of a new bridge to replace the 58-year-old Tappan Zee Bridge spanning the Hudson River, Tuesday, May 13, 2014, between Tarrytown and Nyack, N.Y. On Wednesday, President Barack Obama plans to speak by the bridge just north of New York City to press his case that a key federal government fund used to pay for the nation's roads, bridges and ports is running dry and that the economy would be damaged if it is not replenished. (AP Photo/Julie Jacobson)

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Construction crews use barges and cranes as work continues on a replacement for the 58-year-old Tappan Zee Bridge spanning the Hudson River, Tuesday, May 13, 2014, near Tarrytown, N.Y. On Wednesday, President Barack Obama plans to speak by the bridge just north of New York City to press his case that a key federal government fund used to pay for the nation's roads, bridges and ports is running dry and that the economy would be damaged if it is not replenished. (AP Photo/Julie Jacobson)

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President Barack Obama walks past the Rose Garden as he heads to Marine One on the South Lawn of the White House in Washington, Wednesday, May 14, 2014. The Obama's are heading to New York. (AP Photo)

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** FILE ** President Barack Obama speaks during a meeting of law enforcement leaders from across the country to discuss immigration reform, Tuesday, May 13, 2014, in the Eisenhower Executive Office Building on the White House complex in Washington. (AP Photo)