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As tensions between the U.S. and Russia reach a breaking point over Edward Snowden's asylum, George Stephanopoulos speaks to Snowden's father Lon Snowden and attorney Bruce Fein, in an interview you'll see only on "This Week." And the chairs of the Senate and House Foreign Relations committees, Sen. Robert Menendez, D-N.J., and Rep. Ed Royce, R-Calif., debate how the U.S. should respond to Russia's actions as well as the latest terrorism threat.

Plus, as potential 2016 candidates start trekking to Iowa, we go one-on-one with Donald Trump on his weekend visit to the Hawkeye State. And the powerhouse roundtable debates all the week's politics, with Rep. Joaquin Castro, D-Texas, Rep. Louie Gohmert, R-Texas, and ABC News' George Will and Donna Brazile. Plus, our special discussion about the sale of The Washington Post and what it means for the future of the news media, with George Will, Huffington Post Media Group editor-in-chief Arianna Huffington, "Bloomberg West" anchor Cory Johnson, and editor of The New Yorker David Remnick.

And in our "Sunday Spotlight," former North Dakota Sen. Byron Dorgan discusses his turn to fiction writing with his new thriller "Gridlock."

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

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