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As the flawed rollout of the Affordable Care Act plagues the Obama administration, and amid continued fallout over the latest revelations of NSA spying, George Stephanopoulos goes one-on-one with White House senior adviser Dan Pfeiffer and Sen. Rand Paul, R-Ky., only on "This Week" Sunday.

Plus, in his debut appearance on ABC News, FiveThirtyEight.com editor-in-chief and ABC News special contributor Nate Silver - who correctly predicted the 2012 presidential election outcome in all 50 states - comes to "This Week" Sunday to analyze the political picture one year out from the 2014 midterm elections.

And the powerhouse roundtable debates all the week's politics, with ABC News political analyst Matthew Dowd, co-host of CNN's "Crossfire" Van Jones, ABC News Chief White House Correspondent Jonathan Karl, and Wall Street Journal columnist Peggy Noonan.

And in our "Sunday Spotlight," Rob Lowe discusses portraying President John F. Kennedy in the new National Geographic Channel film "Killing Kennedy."

See the whole political picture, Sunday on "This Week."

Note: "This Week" will air at 2 p.m. ET on WABC in New York this Sunday due to NYC Marathon coverage. And be sure to set your clocks back one hour on Sunday for the end of Daylight Saving Time.

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