Mixed Picture for Stocks, China News Conference Coming, Twitter Flags Trump, Bristol Myers CEO

Carl Quintanilla, Jim Cramer and David Faber discuss the mixed picture for stocks on the last trading day for the month of May. Investors are bracing for a news conference on U.S. – China relations from President Trump this afternoon. And a battle between the President and social media companies heating up. Twitter flagging a tweet from the President on Minneapolis saying it’s quote, “glorifying violence.” Plus, the CEO of Bristol Myers joins “Squawk on the Street” to discuss the development of a vaccine for Covid-19.