My own solution is to arrange a territorial trade with Canada.
They get New England, Long Guyland, Martha Stewart, Chappaqua, and the east (right) bank of the Hudson as high as the Croton Reservoir, following the river up to the marshes close to the New York/Connecticut state line and then following the New York state line north. With that they get about 30,000,000 New Englanders, almost all Democrats.
We get British Columbia, Manitoba, and everything in between, plus the Yukon. They keep Nunavut and the frozen treasurehouse of the North. We get Alberta gas and oil, lots of Pacific coastline, scenery, the Canadian Rockies, fisheries, and salmon hatcheries, and about 5,000,000 Canadians who'd register on our political radar as somewhere between moderate conservative to left-leaning MOR, with about 3,000,000 socialists of varying degrees of hardness of core thrown in, who hopefully would leave right away for pinker climates further east.
Sound like a deal?
Then all we'd have to do is to figure out a way to get rid of Ithaca, City of Evil, and persuade all that left-wing screen talent in Hollywood to take up working at Shepperton Studios in England among the Eurosocialists.
Then everybody be happy!!