Since 1999 when it was a democratic president facing impeachment. norah? >> o'donnell: nancy, thank you. there is breaking news tonight from america's largest exporter, boeing. the company now says it will suspend production of its troubled 737 max plane starting next month. the max was grounded worldwide after two deadly crashes. kris van cleave covers aviation for us, and, kris, is this expected to send shock waves through the u.s. economy? >> reporter: norah, it certainly could. boeing has 600 suppliers, so you're talking about tens of thousands of supply chain workers that will be affected...