Republican presidential front-runner Donald Trump had a new target on Sunday, calling fellow White House contender Ted Cruz a "a little bit of a maniac" as the U.S. senator surpassed him in an Iowa presidential poll.
Cruz's dogged pursuit of conservative Iowa voters has paid off in the form of a 10-point lead over Trump in the state with one of the earliest presidential contests.
Unlike the other Republicans in the 2016 White House race, the U.S. senator from Texas has embraced Trump and avoided public criticism of the popular candidate.
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