appreciate it. turning to 2020 politics and joe biden on his 15th trip to iowa today. secured a highly coveted endo e endorsement. the former governor iowa tom vilsack and his wife supporting joe biden as the former vice president looks to shore up support in the first caucus state. bring in nbc news road warrior, in des moines right now. you're following the biden campaign today. what are some of the caucusgoers, the town halls he's visiting, keenly interested in? >> reporter: it's interesting. it's very different from something that we're talking about very often on television, and across the news cycle which is impeachment. that actually doesn't come up in any of the town halls i've heard here in iowa or others biden held across the country. instead asking about his plan for education, plan to end