Sunday on ‘This Week’: British Prime Minister Theresa May, Lt. Gen. H. R. McMaster and Rep. Adam Schiff

And the Powerhouse Roundtable debates the week in politics, with Republican strategist and ABC News contributor Alex Castellanos, Open Society Foundations vice president and former U.S. Ambassador to South Africa Patrick Gaspard, ABC News Chief White House Correspondent Jonathan Karl, Republican strategist and CNN political commentator Alice Stewart, and editor and publisher of The Nation Katrina vanden Heuvel.

See the whole political picture, Sunday on “This Week.”

Like “This Week” on Facebook here. You can also follow the show on Twitter here.

Go here to find out when “This Week” is on in your area.

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