Aaron Blake says the debate over whether to call witnesses still hangs over the impeachment trial. Vanessa Williams reports on why 8 in 10 black Americans say President Trump is racist. And many questions remain as Britain prepares to leave the E.U.Read more:All eyes are on the moderate Republicans as the Senate impeachment trial enters a new phase). Most black Americans say Trump is “racist.”)Impending Brexit leaves loose ends).Subscribe to The Washington Post: https://postreports.com/offer)