I don't think that is necessarily the case.
If Trump gets back in, we will be left with a choice. Either we get fully in bed with the Americans or we realign with the EU.
It may not be full membership with the EU. But, they will have to change their stance on the free market and freedom of movement, in exchange for us making our military and nuclear arsenal available to a EU military force.
Make no mistake, if Trump gets in, he will come gunning for us. Not only are we strategicly placed for keeping the EU in check (Which is perfect for his Russian overlords), but he will rape all our systems and democracy.
We cannot just exist in isolation. We need to align ourselves back with the EU. They might not need us from a financial perspective, but they need us from a protection perspective. We also need them, otherwise we are just going to wither and die. The way we are going, we will end up as the thinking man's North Korea.
The outlook has changed since the Brexit vote. We need to reconcile and resolve our differences. Britain is better off aligned with the EU and we are all safer if we work together.