If Tuesday’s “hearing” on the Brett Kavanaugh nomination is how it’s going to be, the Senate might as well quit bothering — or at least stop televising the farce.

Kavanaugh’s extensive record — hundreds of opinions, journal articles and so on — are more than enough for senators to make up their minds about how to vote. (And he’s happy to sit down for a chat with any who even pretend to remain unsure.)

Most Democrats already have decided to oppose him. And they’re the ones demanding more documents from his years as a White House functionary — purely in hopes that somewhere they can find something that will look bad enough to prompt some nervous Republican senator to bolt.

This is what Supreme Court confirmations have come to: a purely partisan exercise, with only a few senators at “risk” of voting across party lines.

The trend is bad for the court and bad for the country — not least because it forces presidents of both parties to stick to the pool of Yale-Harvard grads who’ve spent their whole adult lives avoiding anything that might torpedo a confirmation, knowing the other side will Dumpster-dive for dirt going back to their college years.

(Starting with Kavanaugh, the opposition search now includes digging into his wife’s past. Are kids next?)

This nominee has said he’ll broadly respect precedent and decide cases on the merits, which strongly suggests he’ll move the high court a bit to the right. And nothing in the hearings will tell the nation much more than that.

So America gets to watch protesters protesting for the cameras, followed by (zzzz) senators senatorizing for the cameras. Then the nominee will say as little as possible in answer to overly long questions, and eventually comes the vote.

This may be democracy, but it’s not deliberation or debate; it’s a debacle.