This week, Treasury Secretary Janet Yellen visited Kyiv to underscore U.S. support for Ukraine. Today, Yellen joined “Marketplace” host Kai Ryssdal to chat about her trip, the “moral obligation” to aid Ukraine and the impact of sanctions on Russia, as well as domestic economic concerns — from the politicization of the debt ceiling to cooling the labor market. Plus, what an inverted yield curve foretells and where consumers are cutting back.