In the
thread for 2008, super white areas tended to win, but such areas have trended right so the maps today may be less white and more urban. Not only was VT-AL the highest white Obama actual CD, but it appeared to be the most white + Obama CD that could possibly be drawn (though at the time CA did not have precinct data so potentially a Bay Area CD could be drawn with the white + Obama above VT-AL, especially if abusing water contiguity).
I have a map for NC entirely in the Triangle of 70.1% white VAP % + 68.9% Biden, for 139%. (One could probably get slightly higher going from the Triangle thru the Triad thru Watauga to Buncombe) I'll post it if someone could let me know how to share or link it. The top five actual CDs are:
VT-AL 156.5%
WI-2 152.0%
ME-1 151.0%
NY-12 150.9%
WA-7 150.8%