We’ve had the baby. So why not the nanny?

Donald Trump has turned the White House — and America — into his crib, wailing and spitting up and throwing things. Republican lawmakers have been consigned to diaper duty. So maybe it’s fitting for Mrs. Doubtfire to pop in to lay down the law in this federally funded nursery.

As in love, voters in presidential races often look for the opposite of what they’ve had. George W. Bush was uninformed and impulsive, so enter Barack Obama. Obama painted cautiously in gray tones, so enter the kaleidoscopic Donald Trump.

Now Trump’s vertiginous reign and policies on climate, guns and trade may have inspired the pragmatic Michael Bloomberg to step up as his opposite. Someone from Bloomberg-world told Axios that if the former mayor of New York jumps in, he will spend “whatever it takes” to defeat Trump.

“All across America, people are clutching their Big Gulps,” David Axelrod cracked.

It’s not a good sign for Democrats — or flagging Joe Biden — that the 77-year-old plutocrat is casting himself as the savior of the party. The trembling Democratic donor class was overjoyed that a Wall Street guy might jump in. But a Bloomberg bid could open the door for Elizabeth Warren to run away with the nomination.