President Trump told reporters Wednesday that 15,000 U.S. troops could soon be deployed to the southern border. The troop deployment number has steadily risen over the last week, from 800 troops to 5,200 to the current official Pentagon number of fewer than 8,000 troops, and the Defense Department was reportedly caught by surprise by Trump doubling the number. Trump says the massive deployment of active-duty troops is necessary to block a "caravan" of about 4,000 migrants slowly moving through Mexico to the U.S. border. "You have caravans coming up that look a lot larger than it's reported actually," Trump told ABC News on Wednesday. "I'm pretty good at estimating crowd size." The U.S. has about 15,000 troops stationed in Afghanistan.

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