New York, where Donald Trump made his name, is also where he may have committed crimes. It’s where his henchmen like Paul Manafort and Michael Cohen did their crimes; many of those aren’t alleged, they’re confirmed.

So it is necessary for Manhattan District Attorney Cy Vance to pursue felony charges against Manafort above and beyond the offenses to which he has already pleaded guilty and been sentenced, including mortgage fraud, conspiracy, falsifying business records and a scheme to defraud.

It is necessary for Manhattan U.S. Attorney Geoffrey Berman to press his case against Cohen, in which the president’s former fixer has already pleaded guilty to tax evasion, making false statements to a federally insured bank and campaign finance violations.

It is necessary for the state Department of Financial Services to demand Deutsche Bank, Signature Bank and New York Community Bank explain their lending relationships with Trump son-in-law and presidential aide Jared Kushner and his family real estate business.

It is necessary for state Attorney General Tish James to subpoena Deutsche Bank and Investors Bank about fishy business in a quartet of Trump deals, all based on what Cohen told a House committee.

It is necessary for Albany to close a double-jeopardy loophole that could prevent local prosecutors from pursuing charges in the event of a federal presidential pardon.

This is not about taking down President Trump or piling on his people. It’s about enforcing the law when it is flagrantly broken.