Liz lies. You read it here first.

No, really. Before she and Bernie Sanders had their notorious she said, he said clash on national TV, long before President Trump started in with the taunts and the DNA challenge, even before her one-time GOP rival Scott Brown said Warren misled the public — it was my 2012 Boston Herald story that started it all.

From the moment I detailed Elizabeth Warren’s claim of Native American heritage — and Harvard University’s claim that she was a minority hire — Warren evaded, misled and, yes, lied when hit with questions on the issue.

Just look at her first comments after the story broke. The day the story ran in the Herald on April 27, 2012, I went to a sparsely attended Warren campaign event in South Boston. I asked how and when did she find out that Harvard was reporting her as a minority hire.

“I think I read it on the front page of the Herald,” she said.

Warren later admitted she lied about this. She knew that Harvard University listed her as a minority hire long before the Herald reported it because she informed university officials herself.

My follow-up question was equally simple: Had she ever listed herself as a Native American on any other application, such as for college or another job?

“Not that I recall,” Warren said.

Of course, we now know she had. She listed herself as a minority in the Association of American Law Schools directory for law professors from 1986 to 1995. She wrote her race as “American Indian,” on a 1986 registration card for the Texas State Bar, the Washington Post reported last year.

Warren even managed to lie when confronted about her lies.

“I misheard a question at a very noisy press conference,” Warren told former “Meet the Press” host David Gregory during a Herald-sponsored debate with Brown on Oct. 1, 2012. The press conference — held at a Friday mid-morning campaign event — was decidedly light on media attendance and was in no way noisy.

As the liar name-calling raged on between Warren and Sanders supporters yesterday — over Warren’s claim that Sanders told her more than a year ago that a woman can’t win — Warren preferred to change the subject.

“I have no further comment on this,” Warren said as she entered the U.S. Capitol for the start of President Trump’s impeachment trial. “We are here right now at an important moment in American history. And that’s what we need to keep our focus on.”

Both Warren and Sanders will have to put their 2020 campaigning on hold during the impeachment proceedings. The two haven’t spoken since their acidic post-debate exchange Tuesday night when Warren accused Sanders of calling her a liar on national TV.

So who is the liar? Warren fans might say my column rehashing old history. Then again, Warren is calling out Sanders for a conversation that happened more than a year ago. Diving deep on the past apparently is all the rage.