recall that horizontal federalism. that is about letting the states play with their policies, both high and low tax. and letting citizens sort themselves and to these groups. how that relates to the internet sales tax is the same way it relates when those of us in washington, d.c. occasionally drive across the border into virginia him and fell up our cars with gas. when we pull into that gas station, that attended doesn't ask for our drivers license and charges residents gas. we are charged at the point of origin. it disciplines d.c. in maryland because they can only raise those gas taxes until everyone decides, forget it, i will spend the extra 10 minutes to get a lower price. in that way, it is healthy test competition. that is what we were experiencing online. yourconsumer, you can take purchases to a lower tax state online. it is a check on government growth that way, which is why a lot of people opposed it. that is kind of how this compatible -- competitive federalism plays into this debate. guest: -- host: all ri