Fiona Hill, former top Russia expert for the White House, and David Holmes, senior diplomat at the US Embassy in Ukraine, are sworn in before testifying at a public impeachment hearing. Tap the link in our bio for live updates.
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At the fifth Democratic debate, Sen. Warren says Pres. Trump created a "crisis" at the U.S. - Mexico border, adding "a great nation does not separate children from their families. We need to live our values at the border."