U.S. Vice-President Joe Biden with Ukraine’s acting Prime Minister Arseniy Yatsenyuk at their April 22 press conference in Kyiv. On January 23 and 27, Vice-President Joe Biden telephoned President Yanukovych to urge an immediate de-escalation in the standoff between protesters and security forces in downtown Kyiv. The vice-president urged Mr. Yanukovych to take steps to...