Billionaire Donald Trump continued to lead the Republican 2016 field in a Fox News national poll published Wednesday, but rival Ted Cruz had made significant gains.

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41 percent of the 388 Republican primary voters surveyed from March 20-22 selected Trump as their choice for the GOP nomination.

Cruz came in second, earning 38 percent of support — double the support the Texas senator received in a Fox News poll conducted in mid-February.

The poll had a margin of error of plus or minus five points, leaving Cruz at a statistical tie with Trump.

John Kasich placed last with 17 percent, a rise of 9 points since the last Fox News poll was taken.

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