‘On whose authority?’: What to watch in impeachment hearings

Gradually, administration officials on both sides of the Atlantic understood that President Donald Trump was using a back channel headed by Rudy Giuliani to push Ukraine for investigations of Democrats.

Former National Security Council adviser Fiona Hill says her team learned more by watching the Republican president’s personal lawyer on television.

They’re the eighth and ninth witnesses to testify publicly before the House impeachment hearings against the 45th president.

Hill was, until July, Trump’s Russia analyst on the National Security Council. In her testimony before impeachment investigators last month, she delivered an impassioned warning that the United States’ faltering resistance to…