It would never go into effect in the U.S., because there will always be a checks and balance system in our political spectrum, especially after seeing what Obama and the Democrats have done when they had complete control of the U.S. Gov't. ie: Obamacare, Dodd/Frank Financial Regs, etc...
Even when Democrats controlled everything, not a single FTT proposal made it out of any committee, much less come up for a vote in the full Congress, despite the fact that Obama supported the FTT idea early in his presidency. It was his own economic advisers that had to talk him out of it, as even they could see what a total disaster any FTT would be in the U.S. The only politicians that have advocated for this idiotic tax are the crazy left wing progressive libertards who are rather small in number, at least for now! Let's keep it that way!
There will never be a global consensus for a FTT. So, if Europe wants to do this, then go ahead, as the U.S. will not follow them off a financial cliff. While the European Hitlers of today wish to commit financial suicide, the U.S. will happily reap the rewards of trillions more investment $$$ coming into their country.
