WASHINGTON – Donald Trump is thumping Ted Cruz by double digits in a new Iowa poll, while Bernie Sanders has grabbed a significant lead from Hillary Clinton among Democrats likely to caucus in the state.

Trump, who has been neck-and-neck with Cruz in recent Iowa GOP surveys, now leads the Texas senator 37 percent to 26 percent, with Florida Sen. Marco Rubio at with 14 percent, according to a CNN/ORC poll released Thursday.

Republican Ben Carson dropped to just 6 percent.

Sanders cracked a majority in the poll, leading Clinton 51 percent to 43 percent in the Democratic primary – presenting Team Clinton with a unsettling rerun scenario of 2008, when she ended up a disappointing third in Iowa.

A month ago, Clinton was running away from Sanders, beating him 54 percent to 36 percent in the state.

A series of recent Iowa polls have had the Republican race closer than the newest survey — including the Des Moines Register, which showed Cruz narrowly edging Trump 25 to 22 percent in a poll issued Jan. 13.

To win, Trump will need to turn out people who haven’t showed up to caucus in the past.