President Donald Trump said Friday that McKesson Corp. would partner with the U.S. government to distribute a coronavirus vaccine when one is approved. Speaking at a White House news conference, Trump said the joint effort was being taken under the federal government's Operation Warp Speed, which aims to deliver COVID-19 vaccine doses to the American public. Shares of McKesson were up nearly 3% in recent trading action. Just prior to Trump's mention of the company, the stock was up about 1.7%.