Republican presidential candidates Ted Cruz, Donald Trump, Marco Rubio, top left to right, and Democratic presidential candidates Hillary Clinton and Bernie Sanders, bottom left to right.
Republican presidential candidates Ted Cruz, Donald Trump, Marco Rubio, top left to right, and Democratic presidential candidates Hillary Clinton and Bernie Sanders, bottom left to right. Mark J. Terrill, Rainier Ehrhardt, Charles Krupa, Mary Altaffer, Evan Vucci AP
Republican presidential candidates Ted Cruz, Donald Trump, Marco Rubio, top left to right, and Democratic presidential candidates Hillary Clinton and Bernie Sanders, bottom left to right. Mark J. Terrill, Rainier Ehrhardt, Charles Krupa, Mary Altaffer, Evan Vucci AP

Iowa makes no apologies for its throwback caucuses as Sen. Marco Rubio, former Florida Gov. Jeb Bush crisscross state

January 30, 2016 12:00 AM

UPDATED January 31, 2016 12:14 AM

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