WE THE PEOPLE

President Barack Obama and Dan Pfeiffer disembark Air Force One upon arrival at Joint Base Andrews, Md. on Pfeiffer’s last day as Senior Advisor to the President, March 6, 2015. Pfeiffer had joined President Obama on his trip to Columbia, South Carolina. (Official White House Photo by Pete Souza)

Lights from the Oval Office are seen from the snow-covered South Grounds of the White House, March 5, 2015. (Official White House Photo by Pete Souza)

President Barack Obama meets with Vice President Joe Biden and advisors in the Oval Office, March 4, 2015. (Official White House Photo by Pete Souza)

An Arizona Army National Guard UH-60 Black Hawk helicopter with 2-285th Assualt Helicopter Battalion in Phoenix soars over a low layer of clouds during a flight to the Western Army Aviation Training site in Marana, Ariz. March 4, 2015. (U.S. Army National Guard photo by Staff Sgt. Brian A. Barbour)

Associate Justice of the Supreme Court Elena Kagan administers the oath of office to Secretary of Defense Ash Carter during a ceremonial swearing-in held in the Pentagon Auditorium, March 6, 2015. DoD photo by Glenn Fawcett (Released)

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PACIFIC OCEAN (March 3, 2015) Sailors assigned to the U.S. 7th Fleet flagship USS Blue Ridge (LCC 19) push water off the main deck during a fresh water wash-down. Blue Ridge is conducting sea trials in preparation for resuming patrols in the 7th Fleet area of responsibility. (U.S. Navy photo by Mass Communication Specialist 3rd Class Liz Dunagan/Released)

A U.S. Soldier, assigned to Bravo Company, 1st Squadron, 9th Cavalry Regiment, 2nd Brigade Combat Team, 1st Calvary Division, provides security outside an enemy compound during Decisive Action Rotation 15-05 at the National Training Center, Fort Irwin, Calif., Feb. 25, 2015. The rotation ensures brigades remain versatile, responsive and consistently available for the current fight and unforeseen future contingencies. (U.S. Army photo by Sgt. Richard W. Jones Jr./Released)

Marines with Mobility Assault Company, 2nd Combat Engineer Battalion, 2nd Marine Division stand behind a blast blanket as detonation cord ignites, blowing the door in and giving them a clear passage to breach the building during an urban breaching course, aboard Camp Lejeune, N.C., March 3, 2015. For each breach, the Marines would stack up behind a blast blanket, which allows them to stand closer to the blast by protecting them from shrapnel and debris. (U.S. Marine Corps photo by Cpl. Justin T. Updegraff)