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Today in the legal arena than they ever did in the past and challenging the exclusive nature of the supremacy clause. so, i think we may see some action by the states. states have brought lawsuits now against the president over the travel ban, so, i think we're seeing muscle flexing by state attorneys general. >> professor dershowitz, professor toobin, sort of. >> ish. >> ish. >> coming up, sarah sanders' comments on the president's words of breeding concept. that's next.

Some of it is narrowly legal, some of it is broadly political, some of it involves the personnel on mueller's staff but i don't think anyone should be confused that this is somehow a novel, legal issue. it's black letter law, it's not controversial and it is just another way of mobilizing the republican base to -- against mueller and prepare the groundwork for the possibility that he -- that the president might arrange for his firing. >> professor toobin and dershowitz, thank you. >> thank you. up next, breaking news on the republican tax plan. you're looking at live pictures from capitol hi...