Well, it is a tax....
Via The Weekly Standard:
The White House today endorsed the Marketplace Fairness Act, which would be a tax hike for purchases made over the Internet. The White House claims the tax would "level playing field for local retailers."
"The Administration strongly supports S. 743, which will level the playing field for local small business retailers that are in competition every day with large out-of-state online companies," reads the Obama administration's statement on the policy.
[snip]The Administration strongly supports provisions in S. 743 that would directly address those concerns by granting only those States and localities that have simplified their sales tax systems the option to require all retailers, including those located out-of-state, to collect sales and use taxes already owed under law. The Administration also is pleased that S. 743 provides an exception for small online businesses and requires States to make available, at no cost to retailers, software that helps calculate the State sales tax on remote transactions, as well as administrative services.[snip]