Sunday on 'This Week': Reince Priebus and Sen. Jeff Sessions

— -- This Sunday, “This Week” co-anchor Martha Raddatz reports from the front lines of the U.S. fight against ISIS, including a rare visit inside an Iraqi city recently liberated from the terrorist group.

Plus, as Donald Trump works to win over GOP leaders, will his party finally unite behind him? RNC Chair Reince Priebus and Trump National Security Advisory Committee chair Sen. Jeff Sessions, R-Alabama, weigh in, Sunday on “This Week.”

The Powerhouse Roundtable debates the week in politics, with Washington Post Chief Correspondent Dan Balz, Rep. Tom Cole, R-Oklahoma, Progressive Caucus Co-Chair Rep. Keith Ellison, D-Minnesota, and Fusion Anchor and Special Correspondent Alicia Menendez.

See the whole political picture, Sunday on “This Week.”

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