Donald Trump Supporters Shout Nazi Salute as Las Vegas Rally Gets Ugly

This video is unavailable because we were unable to load a message from our sponsors.

If you are using ad-blocking software, please disable it and reload the page.

Donald Trump drew a big crowd of both supporters and protesters at his rally in Las Vegas on Monday night.

Read: Donald Trump Calls Ted Cruz A 'Maniac,' Cruz Hits Right Back

The front runner was in Sin City ahead of Tuesday night’s CNN debate - but the event at the Westgate Las Vegas Resort turned ugly after protestors tussled with security.

At one point as security guards attempted to remove a black man from the event, an attendee was heard saying: “Light the m****f**** on fire!”

As one protestor was being escorted out of the venue, Trump was heard saying: "Bye, bye."

A new Quinnipiac University poll out of Iowa has Ted Cruz nipping at Trump's heels. According to the poll, Trump's at 28 percent and Cruz is right behind him at 27 percent.

Read: Here's Jon Stewart Performing His Best Donald Trump Impression

According to Peter A. Brown, assistant director of the Quinnipiac University Poll: "One good sign for Sen. Cruz in his battle with Trump is that voters view him much more favorably than Trump, meaning that the Texas lawmaker may have a higher potential upside.”

Nationally, Trump is running away with it. A Monmouth University poll has Trump at a stunning 41 percent and Cruz is his closest competitor at 14 percent.

“It has become abundantly clear that Trump is giving his supporters exactly what they want, even if what he says causes the GOP leadership and many Republican voters to cringe,” according to Patrick Murray, director of the independent Monmouth University Polling Institute in West Long Branch, New Jersey.

Watch Below: Donald Trump's Doctor: He Will be the Healthiest Person Ever Elected President