Congratulations are due to New York’s senior senator, Chuck Schumer. And we do mean “senior”: He turns 66 on Wednesday.

More, he’ll soon start his fourth term in the Senate, on top of 18 years in the Millionaire’s Club as a champion of the working and middle classes (and of a local industry known as Wall Street, too).

Schumer has now served New Yorkers for almost 42 years in public office. He’s also the Democrats’ next Senate leader, even if his hopes of becoming majority leader were just dashed.

Then, too, if he grows tired of Washington, where he’s worked since 1981, he can retire — he now qualifies to collect substantial Social Security benefits, as well as a hefty congressional pension.

But he may savor the chance to work with the new president, for example, in winning fresh infrastructure funding for New York. The opportunities for new Sunday press conferences seem endless . . .