him behind mayor pete buttigieg. so we're only about two months away now from the iowa caucuses. is biden's bus tour a mad dash to recover? >> biden has been behind in iowa for a good amount of this race. and so we're seeing his team pay much more attention to that first caucus. so if you come out on top out of iowa, then you have momentum going into new hampshire. but again even though buttigieg is on top, that can change in a matter of weeks or in the time that is left between now and iowa. >> so pete buttigieg is on top, but you wrote about a new ad running in iowa and buttigieg warning against free college tuition, something that both bernie sanders and warren have many key to their campaigns.