Boston Mayor Tom Menino wants to keep fast-food chain Chick-fil-A out of Boston because the company opposes same-sex marriage. Legally, Menino may in the wrong. Yet he is also completely in the right. The dustup has been portrayed as a First Amendment issue. In truth, it’s more about smart politics, mayoral power and — like it or not — Menino’s ability to make the city in his own vision. Chick-fil-A founder Truett Cathy is reputed to have invented the chicken sandwich; his first Atlanta store in 1967 has grown to a multi-billion-dollar empire with over 1,600 outlets. Finding a Chick-fil-A...