I hereby announce that I am calling for the formation of a movement to impeach Joe Biden.

What’s that you say? He hasn’t been elected president yet?

No problem. People were calling for Donald Trump’s impeachment even before he took office.

And there were plenty of prominent Democrats calling for Trump’s impeachment long before this current kerfuffle.

Perhaps the most prominent is Elizabeth Holtzman, the former congresswoman from New York who served on the House Judiciary Committee during the Watergate hearings.

On Jan. 1 of this year, Holtzman’s book “The Case for Impeaching Trump” came out. In it, Holtzman laid out a laundry list of reasons Trump should be impeached, ranging from his railing against “fake news” to his treatment of undocumented aliens at the border.

On Thursday, Holtzman appeared on WNYC during a break in the House hearings and succinctly stated her conception of the impeachable offense Trump committed in his dealings with Ukraine.

If I hadn’t heard it with my own ears, I wouldn’t have believed it.

“The president may not use his office for personal or political gain,” Holtzman said.

She’s right about personal gain. If a politician can be proven to have taken illicit payments, then that politician’s career will go the way of the man who otherwise would have been President Spiro Agnew.

But political gain?

Every president, whether Republican or Democratic, begins seeking political gain the minute he takes the oath of office. That’s the nature of politics.

That’s also the reason this impeachment effort is going to boomerang on my Democratic friends. They are so consumed with rage at the mere thought of Trump occupying the White House that they can’t think straight.

If they could, they would realize that the politician most likely to come out on the losing side of this fight is not Trump but Biden.

Those questions about his and his son’s dealings in Ukraine first surfaced not as a Republican hit piece but as an excellent piece of TV journalism by ABC-TV News. (See below)

That broadcast showed Biden ducking the question of just how his son Hunter managed to secure a $50,000-per-month job on the board of a Ukrainian gas company not long after his father the vice president visited there.

Coincidence? Perhaps. But Biden will have to stop ducking that question sooner or later, perhaps when Elizabeth Warren corners him in a debate.

At the moment the question before the public may be, “Why did Trump try to dig up dirt on Biden?”

But as the probe goes on, the public will wonder just what dirt the president was seeking.

Even if that $50,000-a-month package is perfectly legal, it’s the sort of thing that arouses the same class envy that Trump is so good at exploiting.

How did the Democrats fall into this trap?

Whenever I get cornered by one of these anti-Trumpers, I hear a stream of invective about Trump’s potty-mouthed ramblings, his hiring of hookers, his racism, his sexism, his misogyny and so on.

My response: He’s a politician. What did you expect?

My Democratic friends expect a lot. Many of them actually look up to politicians, a habit I abandoned the moment I began covering politics.

Their mistake, if I may cite the great H.L. Mencken put it, lies in believing “that politicians are divided into classes, and that one of those classes is made up of good ones.”

That’s certainly Holtzman’s mistake. As a do-gooder liberal, she is probably sincere in her belief that politicians should not use their offices to seek political advantage.

But how did that work out for her? After her stint in Congress, it was all downhill. In 1980, she lost a U.S. Senate race to Republican Al D’Amato. In 1992, she managed to finish fourth in a Democratic U.S. Senate primary, behind even Al Sharpton.

As for her call for impeachment, that’s not likely to turn out to be an exercise in practical politics either. Unlike Richard Nixon, Trump will not be resigning of his own free will. Instead he will again use his office for political gain by firing up his base.

That base will turn out big in the only trial that matters, which will be not in the Senate but in the court of public opinion.

I would therefore suggest to the members of that base that they don’t need to start printing up those “Impeach Biden” posters just yet.

I sincerely doubt they’ll be needed.