Summary: Even before the U.S. moved on Friday to sever normal trade with Russia, sanctions were far-reaching, and the ruble's value has plunged as a result. One estimate suggested the Russian economy may fall so steeply it will wipe out growth from the last two decades, as more companies walk away from doing business there. Jeffrey Sonnenfeld, of the Yale School of Management, joins Amna Nawaz to discuss. PBS NewsHour is supported by - https://www.pbs.org/newshour/about/funders
