The boss has been talking about this since the days when I was his syndicator at the old North Star site, and that was before (and during) his presidential campaign. There are trillions of dollars U.S. companies have parked overseas, and they've left them overseas for years because bringing the money home meant paying a 35 percent tax on repatriated profits.
It's hard to imagine tax policy more insane than this. Not only have the companies already paid taxes on the profits in the countries where they made them, but the tax served as a massive disincentive to bring that money back home. Why would you bring it home minus 35 percent when you could invest all of it elsewhere?