Republican presidential candidates Rick Santorum, left, and Donald Trump, center, laugh as they listen to Mike Huckabee during a campaign event on the campus of Drake University Thursday, Jan. 28, 2016, in Des Moines, Iowa. (AP Photo/Jae C. Hong)
For Donald Trump, Iowa’s caucuses will be the first test of whether the celebrity businessman and political newcomer will be able to transform the massive crowds he has drawn throughout the election into votes as the U.S. primary season gets underway Monday.
Trump’s outsider candidacy has upended the Republican establishment, largely dominating the polls in the race to nominate the party’s presidential candidate ahead of November elections. Meanwhile, establishment-supported candidates like former Florida Gov. Jeb Bush and Florida Sen. Marco Rubio have failed to take-off.