Sunday on 'This Week': Sen. Bernie Sanders, Reince Priebus, and Charles Koch

— -- Ahead of high-stakes contests in five states next Tuesday, Democratic presidential candidate Sen. Bernie Sanders and RNC Chair Reince Priebus come to “This Week” Sunday.

And in a Sunday exclusive, the billionaire CEO of Koch Industries Charles Koch weighs in on the 2016 race, only on “This Week.”

The Powerhouse Roundtable debates the week in politics, with ABC News contributor, Correct the Record senior adviser and former Democratic Michigan Governor Jennifer Granholm, ABC News Chief White House Correspondent Jonathan Karl, ABC News contributor and Weekly Standard editor Bill Kristol, ABC News contributor and Republican strategist Ana Navarro, and editor and publisher of The Nation Katrina vanden Heuvel.

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

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