Along the border of Nassau County and Queens, a border that is at times almost indistinguishable, the political climates couldn’t be more opposed. In New York City, Zohran Mamdani, 34, will assume the mayoralty. A democratic socialist, he campaigned on promises to tax the city’s wealthiest 1% to pay for free busing and child care, and to push back against immigration raids. Across the county line, Republican Bruce Blakeman, 70, cruised to reelection as Nassau County executive on a starkly differ