FACTBOX-'Witness intimidation is a crime': reaction to Trump impeachment hearing

The U.S. House of Representatives Intelligence Committee held its second public hearing on Friday in an impeachment inquiry examining President Donald Trump's dealings with Ukraine, with Marie Yovanovitch, former U.S. ambassador to Ukraine, testifying. As Yovanovitch testified, Trump fired off criticism of her on Twitter, a move Democrats labeled "real-time" witness intimidation.