A new NBC News/Wall Street Journal/Marist poll in Iowa finds Donald Trump with a double-digit lead over Ted Cruz, 31% to 12%, followed by Marco Rubio at 11%, John Kasich at 11%, Jeb Bush at 8% and Chris Christie at 7%.
In the Democratic race, Bernie Sanders has expanded his lead to 19 points over Hillary Clinton, 57% to 38%.


?Political Trivia
Eight moments in political history. Put them on a timeline.
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Five senators. Three bills. Can you guess how they all voted?
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Nine Justices. One case. How did they rule?
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Do you have your finger on the pulse of America?
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Four questions a day.
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A new game every day.