Republican U.S. presidential candidate Donald Trump addresses a campaign rally in Portland, Maine March 3, 2016.

Donald Trump and Hillary Clinton are leading their competitors by double digits in Michigan's March 8 primary, according to a new NBC News/Wall Street Journal/Marist poll.

In the Republican race, Trump gets support from 41 percent of likely primary voters — followed by Ted Cruz at 22 percent, Marco Rubio at 17 percent and John Kasich at 13 percent.