You'll have better luck finding the fountain of youth or eradicating the cockroach.
You can push back, kick, scream, fight all you want but it isn't a force you will be able to stop. Yeah, US companies are going to turn their backs on China and India and the more than 2.7 billion people that live there. You want access to those markets you will have to give access to ours.
It does feel like deja vu all over again with Republicans who fought to open markets...Richard Nixon's biggest feather(in his opinion) was opening relations with China, NAFTA was Reagan's idea and negotiated by Bush...now calling for protectionism. Republicans fought to allow the wealthy to keep more of their wealth with the thought that wealth would "trickle down" to the middle class. Still the GOP fights for this idea when the truth is that wealth and extreme wealth only create the desires for even more wealth. Your boys allowed with your blessings for the top 1% to accumulate more than 40% of the wealth and thus the control of the economy and direction of future trade.
Brexit will prove to be no more than a fart in the wind. It feels good coming out but then it's gone.
There is no getting your virginity back. There is no putting the genie back in the bottle.