AUSTIN, TX - APRIL 06: Texas National Guard helicopters traveling to the Texas-Mexico border prepare to fly on April 6, 2018 in Austin, Texas. Brigadier General Tracy Norris announced during a press conference that the Texas National Guard will immediately deploy an expected 250 peronnel with supporting aircraft, vehicles and equipment within 72 hours. (Photo by Drew Anthony Smith/Getty Images)
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Trump: We are sealing up our southern border
Defense Secretary James Mattis has signed orders to deploy up to 4,000 National Guard troops to the southern border of the US. CNN's Kaylee Hartung reports.
1:30 • Source: CNN
Trump's border wall 16 videos
AUSTIN, TX - APRIL 06: Texas National Guard helicopters traveling to the Texas-Mexico border prepare to fly on April 6, 2018 in Austin, Texas. Brigadier General Tracy Norris announced during a press conference that the Texas National Guard will immediately deploy an expected 250 peronnel with supporting aircraft, vehicles and equipment within 72 hours. (Photo by Drew Anthony Smith/Getty Images)
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Trump: We are sealing up our southern border
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US President Donald Trump (C) is shown border wall prototypes in San Diego, California on March 13, 2018. / AFP PHOTO / MANDEL NGAN (Photo credit should read MANDEL NGAN/AFP/Getty Images)
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Trump's military guard may face legal hurdles
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A member of the Arizona National Guard talks on the phone on April 9, 2018 at the Papago Park Military Reservation in Phoenix. Arizona deployed its first 225 National Guard members to the Mexican border on Monday after President Donald Trump ordered thousands of troops to the frontier region to combat drug trafficking and illegal immigration. "The Arizona National Guard will deploy 225 members of the Guard today to support border security measures," the state militia said in a statement. / AFP PHOTO / Caitlin O'Hara (Photo credit should read CAITLIN O'HARA/AFP/Getty Images)
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A group of Central Americans crossed into Mexico in March as part of a migrant "caravan" heading to the United States border.
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