I've writtenbefore about the political geography of Fairfield County, Connecticut. As it happens, the Secretary of the State has town-level election results for every election back to 1922. I decided to use this to try to figure out when Fairfield County turned into the moderately Democratic bastion it is today.
My interactive charts and writeups are here but I thought I'd write up some of what I've found. (If you want the charts fully-sized, though, then I'd suggest following the link...)