2nd whistleblower adds to impeachment peril at White House

U.S. President Donald Trump speaks during a rally in Cincinnati, Ohio, U.S., on Thursday, Aug. 1, 2019. Trump abruptly escalated the trade war with China, throwing the focus on how Beijing will respond to a step that threatens to scupper the chances of a deal between the two sides. Photographer: Matthew Hatcher/Bloomberg

A second whistleblower has come forward with information about US President Donald Trump’s dealings with Ukraine, adding to the impeachment peril engulfing the White House and potentially providing new leads to Democrats in their unfurling investigation of Trump’s conduct.