Sec. Alejandro Mayorkas, Rep. Scott Perry, Rep. Andy Barr, and U.S. Capitol Police Officer Harry Dunn Sunday on "This Week with George Stephanopoulos"

HEADLINERS

Alejandro Mayorkas

Homeland Security Secretary

Exclusive

Rep. Scott Perry

(R) Pennsylvania

Exclusive

Rep. Andy Barr

(R) Kentucky

Exclusive

Harry Dunn

U.S. Capitol Police Officer

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POWERHOUSE ROUNDTABLE

Chris Christie

Former New Jersey Governor

ABC News Contributor

Donna Brazile

Former DNC Chair

ABC News Contributor

Maggie Haberman

New York Times Senior Political Correspondent

Susan Page

USA Today Washington Bureau Chief

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