AdvertisementBiden warns Putin of a decisive response if Russia invades UkraineUpdated February 12, 2022Deepa ShivaramfacebookEmailPresident Biden speaks with President Vladimir Putin over the phone Saturday about the escalating crisis near the Ukraine border. Biden told Putin the U.S. and its allies would "respond decisively and impose swift and severe costs" if Russia invaded, the White House said. (AP)This article was originally published on February 12, 2022.