It used to be that the only way to escape oppressive taxation in this country was to leave. Now, Democrats want to tax people who leave.
Chuck Schumer has introduced a bill that would require a massive tax be paid by anyone who renounces their United States citizenship and leaves the country. Apparently, the man who is putting Facebook on the stock market has renounced his citizenship and has become a citizen of Singapore. (There are no capital gains taxes there).
Schumer thinks it is constitutional for the United States government to force this man to pay a huge amount of taxes as a penalty for leaving the country. Sorry, Senator, but such a move is unconstitutional and illegal. It would not only be unconstitutional to tax a non-citizen, but also it would be an ex post facto law. In other words, Congress cannot pass a law making something illegal and then go back prior to its passage to prosecute someone.