Sunday: Defense Secretary Chuck Hagel, Sen. Marco Rubio

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Secretary of Defense Chuck Hagel and Sen. Marco Rubio, R-Florida, come to "This Week" Sunday.

And the powerhouse roundtable debates all the week's politics, with Democratic strategist and ABC News contributor Donna Brazile, Weekly Standard editor and ABC News contributor Bill Kristol, Rep. Adam Kinzinger, R-Illinois, and radio host Michael Smerconish, author of the new book "TALK."

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

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