There’s one less Democrat and one more Republican in Mecklenburg County, and the math might just work out to one more Republican on the Charlotte City Council. Long odds on another political calculation might add up to a new Republican mayor. Last week, Optimist Park community activist Linda Williams officially switched her party affiliation from Democrat to Republican. On Monday, former City Councilmember Mike Castano, who has been a Republican since birth, officially announced he was running for mayor, seeking to unseat four-term incumbent Pat McCrory, also a Republican, who might or might not run for another term. McCrory hasn’t...