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Donald Trump rallies crowd in Colorado Springs

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COLORADO SPRINGS, Colo. -- Donald Trump returned to Colorado on Saturday night, rallying voters in the "reddest" part of Colorado -- Colorado Springs.

Trump's plane arrived about 45 minutes ahead of schedule, and he started his speech early outside a hangar at the airport -- with his signature plane behind him.

"This is great in a hangar yet in a hangar," Trump told the crowd.

Trump began by discussing the ongoing situation in New York City, telling the crowd that a "bomb" exploded even though authorities only were describing it as an explosion at that time.

"Just before I got off the plane a bomb went off in New York and nobody knows what's going on but we are living in a time -- we better get very tough folks," he said.

Trump, who struggled over the summer to unite Republicans in Colorado, seemed to relish in new poll numbers.

"A new poll came out and we are up four points in Colorado," Trump said.

The speech was very much a greatest hits album of his campaign over the past year -- emphasizing immigration.

"We are going to end illegal immigration and we will build a wall," Trump said.

Trump called former Secretary of Defense Robert Gates "nasty" for Gates' recent comments saying he was unfit for office. Gates served in the administrations of George W. Bush and Barack Obama.

"I don't like critics. I like the people that get it done and get it done right," Trump said.