Follow CBSMIAMI.COM: Facebook | Twitter

MIAMI (CBSMiami/AP) — The 2016 Presidential race is beginning to heat up for the majority of the candidates.

READ MORE: Panic Buying Over Fuel Pipeline Shut Down Has Led To Long Lines At Some South Florida Gas Stations

Republican presidential candidate Marco Rubio unveils his first national television campaign ad this week, focusing on the terror threat of the Islamic State group.

The Florida senator appears by himself in the ad and says there is “no middle ground” in America’s fight against IS because “these are radical terrorists who want to kill us.”

READ MORE: Broward Schools Supt. Robert Runcie, Former General Counsel Barbara Myrick Enter Not Guilty Pleas During Arraignment

He says it is “a civilizational struggle” and that “there can be no arrangement or negotiation” with IS, “either they win or we do.”

The Rubio campaign says in a statement on Sunday that the 30-second ad will air nationwide, beginning Tuesday.

Rubio is in Iowa on a five-day campaign visit. The latest poll in the early caucus state shows him trailing front-runner Donald Trump, Ted Cruz and Dr. Ben Carson.

MORE NEWS: Doctors Warn Lithium Batteries Can Pose Risk To Young Children

(TM and © Copyright 2015 CBS Radio Inc. and its relevant subsidiaries. CBS RADIO and EYE Logo TM and Copyright 2015 CBS Broadcasting Inc. Used under license. All Rights Reserved. This material may not be published, broadcast, rewritten, or redistributed. The Associated Press contributed to this report.)