I support allowing states to collect equal sales taxes on all online purchases..
Currently Amazon and some others collect sales tax on all their direct sales but do not collect taxes on sales from other vendors that use the Amazon site.
I support an equal playing field for all online sellers and store retailers.
I think online sales are on a growth path and store outlets will slowly decline but equal taxation is a fairness issue though it will slightly slow but not reverse the trend toward online spending.
25 years ago there may have been an "infant industry" argument for not taxing online sales at all but now this is mature and rapidly growing market segment and does not any longer deserve special treatment versus store retail.
It will be interesting to see what the Supreme Court does.