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Sunday on "This Week," ABC News covers the latest on the mass shooting at Fort Hood with Rep. John Carter, R-Texas, and former Army Vice Chief of Staff Ret. Gen. Peter Chiarelli.

Plus, Sen. Claire McCaskill, D-Mo., weighs in on the General Motors recall investigation following GM CEO Mary Barra's testimony on Capitol Hill, only on "This Week."

And the powerhouse roundtable debates all the week's politics, with ABC News contributor and Democratic strategist Donna Brazile, former House Speaker and CNN "Crossfire" co-host Newt Gingrich, ABC News contributor and Weekly Standard editor Bill Kristol, and Fusion's "AM Tonight" host Alicia Menendez.

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

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