Before the 80-year-old president took the podium, he was introduced by Nevada Gov.Joe Lombardo, who took a moment to honor Las Vegas Metro police officer Austin "Zade" Abdelnabi. The former Marine, 30, died on Tuesday while responding to a report of a person with a gun acting erratically.

"I know Pastor Teis spoke about Officer Abdelnabi," Lombardo began to say, as members of the audience were heard audibly booing.

Lombardo looked concerned as he heard the jeers.

Can you say "racists?"