Sunday on ‘This Week:’ Dr. Ben Carson and General John Allen

— -- Republican presidential candidate Ben Carson discusses his campaign and the upcoming GOP debate, Sunday on “This Week.”

Then, Gen. John Allen, Special Envoy for the Global Coalition to Counter ISIS and House Homeland Security Committee Chair Rep. Michael McCaul, R-Texas, weigh in on the fight against ISIS and the refugee crisis facing Europe.

Plus, the Powerhouse Roundtable debates the week in politics with the host of NPR’s Morning Edition, Steve Inskeep, Washington Post national political reporter Robert Costa, Republican strategist and pollster Kristen Soltis Anderson, and Democratic strategist Maria Cardona.

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

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