Governor Andrew Cuomo’s lawyers will be in federal court in Albany next month, when they’ll try to get a judge to dismiss the lawsuit against him [1]by America’s largest civil-rights organization.

The group is the National Rifle Association, which is asking a federal court to halt the governor’s efforts to use financial regulations to drive the gun-rights defenders out of business here. Think of it as the first court test of what could be called the “Cuomo doctrine” — the governor’s vow that “extreme conservatives” have “no place in the state of New York.”

Mr. Cuomo first declared his doctrine in a radio interview in January 2014. He railed against “extreme conservatives who are ‘right to life,’ ‘pro assault weapon,’ ‘anti-gay.’ ” Mr. Cuomo didn’t say whether he meant to include in his list of deplorables all Catholics, say, or Muslims, or Orthodox Jews.

What had really set Mr. Cuomo off was Republican opposition to his gun-control measures. He was infuriated that, after Sandy Hook, some objected to tightening already-strict New York gun laws.

Fair enough, one might say. The governor of New York is entitled to have a view on guns, to differ with the NRA, and to join robustly in the debate over what to do about gun violence.

In April of this year, though, state regulators told insurers and banks they oversee to look at their relationships with gun-rights groups. They warned of “reputational risks” in their “dealings” with the NRA.

“Nice little business you have here,” the state seemed to be saying to banks and insurers. “It’d be a shame if something happened to it.” The state has left little doubt that it was loaded for bear.

In May, regulators extracted fines of $1.3

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