Sunday on ‘This Week’: Former White House Chief of Staff Reince Priebus, former Gov. Chris Christie, Sen. Chris Murphy

— -- After another week of White House turmoil, former White House Chief of Staff Reince Priebus and Trump ally former New Jersey Gov. Chris Christie come to “This Week” Sunday.

Plus, Sen. Chris Murphy (D-Conn.) responds to President Trump’s shifting stances in the gun control debate. And Secretary of Commerce Wilbur Ross discusses the president’s proposed tariffs on steel and aluminum and the prospects of a trade war.

And the Powerhouse Roundtable debates the week in politics, with ABC News Senior White House Correspondent Cecilia Vega, ABC News Political Analyst Matthew Dowd, Host of CNN’s “The Van Jones Show” Van Jones, Co-Host of “The View” Meghan McCain, and former Bloomberg Businessweek Editor Megan Murphy.

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