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Mexican border

A thousand National Guard troops from Texas will try to address one of the unintended results of President Trump’s immigration crackdown -- traffic jams that are slowing international commerce.

U.S. agents fired tear gas at a group of migrants on Sunday as they tried to cross into the United States from Tijuana, Mexico.

The incident took place at the San Ysidro Land Port of Entry between Tijuana and San Diego, where tens of thousands of people cross between the U.S. and Mexico each day.