(WASHINGTON) — President Donald Trump repeatedly prodded Ukraine’s new leader to work with Rudy Giuliani and the U.S. attorney general to investigate Democratic political rival Joe Biden, according to a rough transcript summarizing the call released Wednesday.

In the call, Trump raised allegations, unsupported by any evidence, that the former vice president sought to interfere with a Ukrainian prosecutor’s investigation of his son Hunter. “There’s a lot of talk about Biden’s son, that Biden stopped the prosecution and a lot of people want to find out about that,” Trump said to Ukrainian President Volodymyr Zelenskiy. “If you can look into it … it sounds horrible to me,” Trump told the Ukrainian president.

The conversation between the two leaders is one piece of a whistleblower’s complaint, which followed the July 25 call. The complaint is central to the formal impeachment inquiry launched Tuesday by House Speaker Nancy Pelosi.

The release of the rough transcript set the parameters of the political debate to come. Trump, at the U.N. on Wednesday, dismissed it and said as he often does that’s he’s the victim of “the single greatest witch hunt in American history.” Democrats say it lays the ground for the congressional impeachment inquiry.

Read more: Read the White House’s Summary of Trump’s Ukraine Call That Triggered Fresh Impeachment Inquiry Calls

Trump aides believed that his oblique, message-by-suggestion style of speaking would not lend itself to the discovery of a “smoking gun” in the transcript. One example in the transcript: Trump says to Zelenskiy, “I would like for you to do us a favor though because our country has been through a lot and Ukraine knows a lot about it.”

The connection to Attorney General William Barr marked a new and potentially more serious issue for Trump because it shows he took steps to involve the U.S. government with a foreign country to investigate a political rival. In the conversation, Trump doesn’t distinguish between the roles of Giuliani, his personal attorney and political ally, and Barr, who as the nation’s top law enforcement officer is supposed to be above the political fray. Barr has been a staunch defender of Trump, most notably during the Mueller investigation.

“Mr. Giuliani is a highly respected man, he was the mayor of New York City, a great mayor, and I would like him to call you,” Trump said, according to the call summary. “I will ask him to call you along with the attorney general.”

Barr hasn’t discussed anything related to Ukraine with Giuliani, officials said.

His messages to his staff were at the center of special counsel Robert Mueller’s investigation into obstruction of justice in the Trump-Russia case. The memo summarizing President Donald Trump’s call with the Ukraine leader shows the president’s lingering fixation on special counsel Robert Mueller’s Russia investigation. Trump flippantly refers to the ex-FBI director as a “man named Robert Mueller” and says he turned in “a very poor performance.”

The memo also shows that the president made reference to the private cybersecurity firm that investigated Russia’s hack of the Democratic National Committee servers during the 2016 election. Trump suggests that Ukraine may be in the possession of the email server, though it’s unclear what he’s referring to. Trump says he’d like to have his attorney general “call you or your people and I would like you to get to the bottom of it.”

Trump has recently confirmed that he ordered the freezing of nearly $400 million in aid to Ukraine a few days before the call. It was not clear from the summary whether Zelenskiy was aware that Trump had frozen the aid.

The president has insisted he did nothing wrong and has denied that any request for help in procuring damaging information about Biden was tied to the aid freeze.

It’s not the first time Trump has sought foreign assistance to undermine a political rival. He publicly asked Russia to release hacked Hillary Clinton emails in 2016, but this is his first documented time doing so while president with the weight of the U.S. government at his disposal.

The president took the 30-minute call from the White House residence, while officials in the Situation Room listened in and worked to keep a record of the conversation, as is standard practice. The resulting memorandum was classified as “Secret’ and “ORCON, for “originator controlled,” to prevent its spread throughout the federal government or to American allies. It was declassified for release on Wednesday.

The release came against the backdrop of the president presiding over a meeting of world leaders at the United Nations, a remarkable split screen even for the turbulence of the Trump era.

The inspector general for the intelligence community wrote to the Director of National Intelligence in August that he believed the conversation between Trump and Ukraine’s leader could have been a federal campaign finance violation because the president could have been soliciting a campaign contribution from a foreign government, a Justice Department official said.

The whistleblower — a member of the intelligence community — said in their complaint that they had heard the information from “White House officials,” but did not have firsthand knowledge of the call, the Justice Department official said.

Prosecutors from the department reviewed a transcript of the call and determined the president did not violate campaign finance law. The determination was made based on the elements of the allegation, and there was no consideration of the department’s policy that a sitting president cannot be indicted, the official said. The official spoke on condition of anonymity in order to discuss internal investigative deliberations.

Justice Department spokeswoman Kerri Kupec said the attorney general was first notified of Trump’s conversation with the Ukrainian president “several weeks after the call took place,” when the department received the referral about potential criminal conduct.

Lawmakers have been demanding details of the whistleblower’s complaint, but the acting director of national intelligence, Joseph Maguire, has refused to share that information, citing presidential privilege. He is to testify Thursday before the House, and lawmakers are expected to have access to details of the complaint beforehand in a classified setting.

The complaint has set off a stunning turn of American political events, leading Pelosi to yield to mounting pressure from fellow Democrats on the impeachment inquiry.

Congress’ probe focuses partly on whether Trump abused his presidential powers and sought help from a foreign government to undermine Biden and help his own re-election. Pelosi said such actions would mark a “betrayal of his oath of office” and declared, “No one is above the law.” The impeachment inquiry, after months of investigations by House Democrats of the Trump administration, sets up the party’s most direct and consequential confrontation with the Republican president, injects deep uncertainty into the 2020 election campaign and tests anew the nation’s constitutional system of checks and balances.

Trump, who thrives on combat, has all but dared Democrats to take this step, confident that the specter of impeachment led by the opposition party will bolster rather than diminish his political support.

Meeting with world leaders at the United Nations, he previewed his defense in an all-caps tweet: “PRESIDENTIAL HARASSMENT!”

Contact us at editors@time.com.

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