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Sunday on "This Week," we go on the trail to Iowa with Tea Party favorite and potential 2016 candidate Sen. Ted Cruz, R-Texas. Three years before the next presidential election, what's this freshman senator doing in the Hawkeye State? Can the Republican party make a comeback in national elections? And how will the battle over immigration reform shape the future of the GOP?

Plus, as Detroit becomes the largest city in American history to file for bankruptcy, George Stephanopoulos goes one-on-one with Detroit Mayor Dave Bing.

And the powerhouse roundtable debates all the week's politics, including the president's extraordinary comments on race, with former Obama White House Green Jobs Adviser and co-host of CNN's "Crossfire" Van Jones; former Bush White House Press Secretary Dana Perino, a Fox News contributor and co-host of Fox News Channel's "The Five"; ABC News' Cokie Roberts; ABC News Political Analyst and Special Correspondent Matthew Dowd; ABC News Chief White House Correspondent Jonathan Karl; and ABC News Senior Justice Correspondent Pierre Thomas.

And in our "Sunday Spotlight," ABC News' Dan Harris tells the story of Piper Kerman, author of "Orange is the New Black," now adapted into a new series on Netflix.

See the whole political picture, Sunday on "This Week."

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