Earlier this month, during a bipartisan meeting in Kiev, Sen. Chris Murphy (D-Conn.) delivered a pointed message to Ukraine's new president, Volodymyr Zelensky. While choosing his words carefully, Murphy made clear - by his own account - that Ukraine currently enjoyed bipartisan support for its U.S. aid but that could be jeopardized if the new president acquiesced to requests by President Trump's lawyer, Rudy Giuliani, to investigate past corruption allegations involving Americans, including former Vice President Joe Biden's family. ... The implied message did not require an interpreter for Zelensky to understand: Investigate the Ukraine dealings of Joe Biden and...