http://isaacbrocksociety.com/2011/12/13/is-the-taxation-of-us-persons-abroad-constitutional/
See also page on this blog about open letter posted on Swiss TV site which covers some of the constitutionality issues and adds a Swiss constitutional perspective: http://stopunconstitutionaldoubletaxation.wordpress.com/open-letter-published-on-swiss-francophone-tv-site/
