and we'll hear from kansas mayor quinton lucas, whose city is grappling with both covid and crime. last year there were a record number of homicides in kansas city. this year is on track to be even worse. what can be done to stem the tide. finally, we'll get an eyeopening look at the chaotic last year of the trump presidency with carol leonnig and philip rucker. it is all ahead on "face the nation." ♪ >> dickerson: good morning and welcome to "face the nation." the highly contagious delta variant is driving the country into a fourth wave of the coronavirus pandemic. infections continue to surge, and with less than half the country fully vaccinated, public officials are urgently trying to convince the hesitant so that the spike doesn't drag on into the fall. we begin with mark strassmann in atlantic. unvaccinated america is playing covid roulette with a mix of reluctance and defiance. and in places like new orleans, the dominant delta variant has pounced. >> it is more aggressive. it is deadlier, and it is in our community. >> reporter: nationally, new covid cases have spiked almost