It comes down to scribbles in the margins.

Donald Trump had his worst day yet in his ongoing civil fraud trial in New York on Tuesday at the hands of his own key witness, a former Trump Organization executive who linked the former president directly to the fuzzy math at the center of the case.

The witness was Jeffrey McConney, who was the comptroller and spreadsheet czar at the Trump Org. McConney had been called to the witness stand by the defense, but on cross-examination by lawyers for the state attorney general’s office Tuesday, he linked Trump firmly to the conspiracy and fraud counts that have yet to be decided in the non-jury trial.

McConney was handed People’s Exhibit 3054, a draft of Trump’s net-worth statement for 2014. He was asked to look at a note scribbled in thin blue ink on the draft’s first page, “DJT TO GET FINAL REVIEW,” which he said he’d written.

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The AG has alleged the net-worth statement that McConney was handed the draft for, from 2014, contained $3.5 billion in exaggerations.

Oh is that all.

“Donald Trump would get final review?” Andrew Amer, the state’s lawyer, asked McConney.

“That was my understanding, yes,” McConney answered from the witness stand, his voice gruff.

Amer asked next whether Trump would get the final review of every net-worth statement until leaving for the White House in 2017, after which Eric Trump would approve the drafts. “That was my understanding, yes,” McConney answered again. Asked whether that was his handwriting on the drafts — the thin blue pen marks — McConney also said yes, it was.

Trump has been claiming that he never knew anything about these petty details, it was the cleaners and elevator maintenance crew who took care of that.

But McConney’s blue-ink handwriting is all over the net-worth statement drafts, showing he revised language and even added cautionary notes that were then passed along for Trump’s “final review,” as McConney said in his own description of the drafting process.

In one key cautionary note from the 2015 draft, McConney made a notation in ink that “this computation also includes forecasted deals that have not signed yet.” In the note, McConney asked whether Trump wanted to exclude some $151 million in as-yet-fictional assets from the net-worth statement.

The final version of that year’s net-worth statement shows McConney’s suggestion was ignored, possibly by Trump himself. The AG alleges that Trump routinely padded out his net-worth statements with the same sorts of nonexistent assets.

Trump pads out absolutely everything with nonexistent something. That “IQ test” is the classic model – “woman man person camera tv” is his approach to life in a nutshell.