President Vladimir Putin has begun sending Russian soldiers into Ukraine after spending months massing troops on the country’s borders. Why is Putin risking so much to take the Donbas region? And does this latest incursion signal a failure of the west’s foreign policy approach to Russia?  Guest: Josh Keating, global security reporter at Grid. If you enjoy this show, please consider signing up for Slate Plus. Slate Plus members get benefits like zero ads on any Slate podcast, bonus episodes of shows like Slow Burn and Dear Prudence—and you’ll be supporting the work we do here on What Next. Sign up now at slate.com/whatnextplus to help support our work. Learn more about your ad choices. Visit megaphone.fm/adchoices