Sunday on “This Week”:​ Rep. Adam Schiff, Alan Dershowitz, Sen. Richard Shelby, Sen. Cory Booker

ABC News Chief Anchor George Stephanopoulos speaks exclusively with Rep. Adam Schiff, D-Calif., the lead House impeachment manager in the trial of President Trump and Harvard Law School professor emeritus Alan Dershowitz.

Plus, Sen. Richard Shelby, R-Ala., and Sen. Cory Booker, D-N.J., join “This Week” Sunday to discuss the latest on the upcoming Senate impeachment trial.

And the Powerhouse Roundtable discusses a historic week in politics, with ABC News Political Analyst Matthew Dowd, former Chicago Mayor and ABC News Contributor Rahm Emanuel, Republican Strategist and ABC News Contributor Sara Fagen, and former DNC Chair and Fox News Contributor Donna Brazile.

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