let's bring in president obama's former budget sheet, peter orszag. good morning.o talk about. do with corporate taxes. inversions would be a good place to begin. presumably, you gave this some thought when you are the budgets chafe under president obama a few years ago. carl levin had a bill that would claim to recover lost corporate tax revenue if it would be apply retroactively. is that credible? >> you started with legislation -- it is hard to tackle this problem without legislation. the limits of the idea that willess is polarized so we do things administratively or through regulation, we're seeing the limits of that. you can only do so much without legislation. jackat being the case, did lew take the right approach? both he and the president have spoken out against inversion. they talked about it being unpatriotic and felt he had to take action. from where you sit, did those new rules make sense? need to use inflammatory rhetoric. they tackle part of the problem you definedt -- if problem as the incentive to invert -- they only attack a modest part. they do n