It will, look at what Trump is doing now. He won't accept US states withholding taxes

By the way, this is something to consider if the US does go splitsville, this is ridiculous and absurd but from a economic standpoint, you'd be fools not to at least consider if they asked annexing California, Washington, and Oregon, for one simple reasom.. A land bridge to Mexico

I did say this was absurd but it'd make sense from a trade standpoint