Donald Trump has raced out to an 11-point lead over Ted Cruz in Iowa, erasing what once was a four point deficit to the Texas Senator over the last two weeks.

The Washington Post reports earlier this month Cruz held a four point lead over Trump in the critical, early voting state, according to a Fox News poll. But since then, Trump has gained ground "across the board," as many of his competitors have slipped and now leads Cruz 34 percent to 23 percent.

A deeper analysis of the numbers reveal Cruz is still over-performing among conservative and Tea Party voters, with support for him among those groups 11 and seven points higher than his overall support.

Still, over the life of his latest surge, Trump has also gained 11 and 17 points respectively among those same two groups, while Cruz's overall support with them has fallen some.

Researchers also point out two weeks ago the percentage of respondents saying they would "definitely" go out and caucus on Feb. 1 was 59 percent. The latest poll reflects that number has now fallen to 54 percent, accounting for a 10-point swing toward those who say they will "probably" go to the caucus.

Earlier this month, Trump trailed Cruz by six points among the "probable" caucus-goers. In the latest poll, he leads with that group by 15 points, a margin even larger than his overall lead over Cruz.

According to Fox, much has transpired over the last two weeks, which could account for some of Trump's dramatic rise, including a debate where the bombastic real estate mogul even questioned his chief rival's legal right to become president.

Iowa Gov. Terry Branstad also recently urged local voters to steer clear of Cruz because of his opposition to ethanol and Trump also gained the endorsement of national Tea Party darling Sarah Palin.

Florida Sen. Marco Rubio places third in the latest polling and is the only other candidate registering double digit support at 12 percent.

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