Sunday on 'This Week': Sen. Tammy Duckworth, Rep. Jim Jordan, Xavier Becerra, Bill Weld

Following President Trump’s declaration of a national emergency on the southern border, Armed Services Committee Member Sen. Tammy Duckworth, D-Ill., and Oversight Committee Ranking Member and House Freedom Caucus Co-Founder Rep. Jim Jordan, R-Ohio, respond only on “This Week” Sunday. And California Attorney General Xavier Becerra discusses his state’s plans for a potential lawsuit challenging the president’s declaration.

Plus, former Massachusetts Governor Bill Weld discusses his likely 2020 presidential bid, the first to challenge President Trump for the Republican nomination.

And the Powerhouse Roundtable debates the week in politics, with ABC News Political Analyst Matthew Dowd, TIME National Political Correspondent Molly Ball, Washington Examiner Chief Congressional Correspondent Susan Ferrechio and Vice News Washington Bureau Chief Shawna Thomas.

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