This creates sweeping powers for the administration: essentially, anyone's US assets can be frozen on the Secretary of the Treasury's say-so, or that of anyone to whom the Secretary delegates that power. Not only that, but any kind of transaction with someone whose assets are frozen, including donations, can get your assets frozen.
Watch what happens to these US Census Bureau tables over the next few years, folks! (links are to Excel files)
International Travelers and Expenditures
Immigrants by Country of Birth
I expect to see a lot less Canadians going down there when the '06, '07 and '08 columns are added.
Ganked from theweaselking.