Where it may or may not have significant effect on where they are leaving ... The people will make the same political mistakes wherever they land.
They tend to leave the disaster areas they help create ... But take their ignorant politics with them and infect society where they go.
Containment is optimal ... Progressives never learn from their mistakes.
That usually occurs when your philosophy is centered on failure always being someone else's fault.
They are liable to do more damage to the political make-up of where they settle after leaving.
That won't make the Progressives unhappy ... They're just modern day carpet baggers.