The above link is to the official Cuyahoga county results for the 1077 precincts. There are some 20 or so precincts with no votes for Romney and many more with just a single digit number.
The presidential race is the second set of results listed...
Republican governor and SoS in Ohio.
What are they doing these days?
These numbers are obviously curious but I would find the raw numbers of registered Republicans in those districts equally curious.