"I am going to be signing a national emergency," Trump said.
The president explained his highly controversial move in a Rose Garden announcement, saying "We're going to confront the national security crisis on our southern border and we're going to do it one way or the other."
He said he was taking "critical actions" but "not because it was a campaign promise."
"We're talking about an invasion of our country with drugs, with human traffickers, with all types of criminals and gangs," he explained.
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