Minnesota

The Canadian-facing states - Washington, Montana, North Dakota, Wisconsin, Michigan, New York, Vermont, New Hampshire, and Maine - are closest in temperament to their Canadian neighbors. Minnesota in particular is a lot like Ontario. Montana is interesting because, while it's generally a conservative state, it has a quirkiness to it that makes it more purple than red. North Dakota and Wisconsin are more rural (and are becoming more rural) than Minnesota, which has Minneapolis/St. Paul acting as the anchor for the state. Washington similarly has the Puget Sound region (Seattle, Tacoma, Olympia) that anchors the state - without that, it would probably look a lot like Montana - The fact that the I5 corridor includes Vancouver, BC also strengthens the association.