issue is taking on donald trump, the existential issue. that's where biden will be. one of the things i'm interested in is that elizabeth warren has been attacking biden for years on this issue of bankruptcy and his sponsorship of a bankruptcy bill that she fought against in the senate in the 2000s. i'm interested if she surfaces that issue in this debate. >> yeah. david axelrod, jen psaki, i appreciate it. more breaking news on a very busy wednesday night. the supreme court has cleared the way for new trump administration restrictions to take effect that would drastically limit the number of central american migrants able to claim asylum in the u.s. the rule would prohibit migrants who travel through mexico or another country without seeking protection there to claim asylum on u.s. soil. it had been challenged in the lower courts but the administration succeeded in persuading the supreme court to allow the rules to go into effect while the appeals process is ongoog. still to come, another new poll, this time looking at how vulnerable president trump may be to a number of the democratic candidates currently running. and later my conversation