(Melina Mara / THE WASHINGTON POST)
Vermont's senior senator is now third in line to the presidency.
(Linda Davidson / The Washington Post)
Vermont Democrat could slow Obama’s plans for quick action on proposals.
The longtime senator joins an elite club with his 14,000th vote.
As the president pro tempore, Sen. Patrick Leahy (D-Vt.) has a different view of the world than most people—but few in his position have ever attempted to share such a unique vantage point with the world through photography.