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House Homeland Security Committee Chair Rep. Michael McCaul, R-Texas, and former New York City police commissioner and ABC News contributor Ray Kelly discuss security for Monday's Boston Marathon Sunday on "This Week."

Plus, George Stephanopoulos goes one-on-one with former Supreme Court Justice John Paul Stevens on his new book "Six Amendments," only on "This Week."

The powerhouse roundtable debates all the week's politics, with ABC News contributor and Democratic strategist Donna Brazile, CNN "Crossfire" co-host S.E. Cupp, ABC News contributor and Weekly Standard editor Bill Kristol, and ABC News Senior Washington Correspondent Jeff Zeleny.

And on this Easter Sunday, our special panel examines the influence of the religious right in politics, with the Rev. Franklin Graham, president and CEO of the Billy Graham Evangelistic Association; Dr. Russell Moore, president of the Southern Baptist Convention's Ethics & Religious Liberty Commission; Ralph Reed, chairman of the Faith & Freedom Coalition and author of the new book, "Awakening"; and ABC News' Cokie Roberts.

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

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