Ukrainian Political Shake-up Involves Figures in U.S. Impeachment

MOSCOW -- Ukraine's president, Volodymyr Zelenskiy, fired his chief of staff Tuesday in a personnel shake-up affecting central figures on the Ukrainian side of the events leading to the impeachment trial of President Donald Trump.The shuffle in Kyiv, the Ukrainian capital, offered fresh evidence of how deeply entangled Ukrainian and American politics have become.The new chief of staff, Andriy Yermak, negotiated last summer with Trump's personal lawyer, Rudy Giuliani, as Giuliani and Trump pressu