I presume they have precincts, and those precincts don't cross either the gubenetorial OR congressional boundaries (If not, I both understand the problem and think they are stupid).
Therefore, they just have to count up the total number of voters in each precinct of the congressional district, and look at how many people voted in the governor's race.
Kind of an odd rule though, why not just use the number of voters in the last CONGRESSIONAL election for a congressional recall?
I wonder if that is east Calhoun? I grew up in Albion so he would rep my mom and in-laws.
My Mom-I-L might sign this petition. She’s a socialist. My Dad-I-L and Mom would tell them to drown themselves in a shallow puddle