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During a speech on Long Island, N.Y., President Trump illustrated the damage that foreign gangs have inflicted on American towns.

"They have transformed peaceful parks and beautiful quiet neighborhoods into blood-stained killing fields," he said. "They're animals."

Speaking to regional law enforcement at Suffolk County Community College in Brentwood, N.Y., Trump said he will "back-up" the police "100 percent."

"We are liberating our American towns [from gangs like MS-13]," Trump said.

Brentwood, along with the nearby Islips, have been the sites of more than a dozen brutal MS-13-related murders this year.

He said some of the affected towns have become like "the Wild West."

Trump, a native of nearby Jamaica, N.Y., said he grew up without even knowing such issues existed in his backyard.

He thanked supportive legislators in the region, including Reps. Peter King of Long Island and Daniel Donovan of Staten Island.

Watch more above.

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