Several election cycles ago, a group of wealthy Jewish donors sought my advice on which candidate to back in an upcoming election. My response was immediate. I told them that with elections, there is only one golden rule: Support both sides of the aisle. You never know who will win – and you never want to be closed out of the corridors of power.That was then – this is now.Zohran Mamdani's bid to be the next mayor of New York City forced a change in the rules of election play. His win forces us,