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Michael Cohen to Testify as Key Witness in Trump Criminal Trial

Michael Cohen is set to testify as the key witness in Donald Trump's criminal trial regarding alleged falsified business records and hush money payments.

Published August 19, 2026 at 10:36 PM EDT

The short answer

Michael Cohen is set to testify as the key witness in Donald Trump's criminal trial regarding alleged falsified business records and hush money payments. Michael Cohen, the former personal attorney for Donald Trump, is expected to serve as the primary witness for the prosecution in a criminal trial against the former president starting Monday.

Michael Cohen to Testify as Key Witness in Trump Criminal Trial

The Facts

Who
Michael Cohen and Donald Trump
What
Michael Cohen's role as the star witness in Donald Trump's criminal trial.
When
Monday (trial start date)
Where
New York City, New York
Why
Cohen's testimony is central to the prosecution's case, but his history of lying under oath presents a challenge for jury credibility.

Timeline of what happened

Key dates and decisions, in the order they occurred.

  1. 2017

    Cohen lies to a Senate committee to benefit Trump.

  2. 2018

    Cohen pleads guilty to campaign-finance violations and other federal crimes.

  3. October 24, 2023

    Cohen testifies in New York civil fraud trial, admitting to prior lies.

  4. February 16, 2024

    Justice Engoron finds Cohen's testimony credible in civil fraud ruling.

  5. March 26, 2024

    Justice Merchan issues gag order barring Trump from attacking witnesses.

Michael Cohen, the former personal attorney for Donald Trump, is expected to serve as the primary witness for the prosecution in a criminal trial against the former president starting Monday. State prosecutors in Manhattan allege that Trump falsified business records to hide a $130,000 payment made to Stormy Daniels to prevent her from publicizing an alleged sexual encounter before the 2016 election. Cohen is expected to testify that Trump personally directed the payment arrangement.

The case relies heavily on Cohen's testimony, which has faced scrutiny due to his history of legal issues and prior false statements. Cohen pleaded guilty in 2018 to several federal crimes, including campaign-finance violations related to the hush money, tax evasion, and lying to Congress. During a recent civil fraud trial against Trump, Cohen admitted under cross-examination that he had previously lied under oath in federal court.

Trump's legal team attempted to bar Cohen from testifying, characterizing him as a habitual liar who committed perjury as recently as last fall. Justice Juan Merchan denied this request, stating he found no legal precedent to prevent a witness from testifying solely because their credibility had been questioned. Prosecutors argued that Cohen’s testimony will be corroborated by physical documents and other witnesses, while Cohen himself stated that attacks on his character are "self-motivated" attempts by Trump to avoid responsibility.

The scale of this legal conflict involves a $130,000 payment that led to a 2018 federal investigation, resulting in Cohen serving a three-year prison sentence. For the former president, the trial represents a unique legal risk where his business practices and campaign conduct are under criminal review. A conviction or acquittal would influence the legal standards for executive accountability and the use of former associates as state witnesses.

A person following this case will notice a direct impact on the public's understanding of how business records must be maintained under New York law. The trial will focus on whether reimbursements for legal expenses were intentionally mislabeled to hide campaign activity. Depending on the verdict, this could influence future prosecutorial strategies regarding white-collar crime and campaign finance. The trial begins Monday, with Cohen’s testimony expected to be a central feature of the proceedings.

Summaries are written by The Plain Record to state the facts of a story plainly and without political slant. See our editorial standards, or report a correction.

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Questions readers ask

What happened: Michael Cohen to Testify as Key Witness in Trump Criminal Trial?

Michael Cohen's role as the star witness in Donald Trump's criminal trial.

Who is involved?

Michael Cohen and Donald Trump

When did this happen?

Monday (trial start date)

Where did this happen?

New York City, New York

Why does this matter?

Cohen's testimony is central to the prosecution's case, but his history of lying under oath presents a challenge for jury credibility.