Former special counsel Jack Smith appeared on Capitol Hill Wednesday for a high-stakes closed-door hearing about his crimes Two defunct criminal investigations Enter President Donald Trump.

In his opening statement, he told Congress that his team has provided evidence “beyond a reasonable doubt” that Trump “engaged in a criminal plan” to overturn the results of the 2020 election. Smith also accused Trump of allegedly mishandling classified documents.

Trump pleaded not guilty in both cases, and the prosecution ended after his re-election.

Since returning to office, Trump has called for investigations into officials who criminally charged him.

House Judiciary Committee Chairman Jim Jordan, a staunch Trump ally, called Smith’s investigation “partisan and politically motivated.”

In an October letter to Smith, Jordan accused the career prosecutor of using “disturbing tactics.”

Republicans also expressed alarm at the decision to subpoena the phone records of several Republican lawmakers as part of the election investigation.

Smith testified Wednesday in a closed setting, meaning the public will not be able to hear his voice in real time.

“The basis for these allegations rests solely on President Trump and his conduct,” Smith told lawmakers in both of his investigations, according to parts of his opening statement obtained by BBC America partner CBS News.

Smith also said investigators found “strong evidence” that Trump retained classified documents and impeded efforts to return them to the government.

He is likely to face tough questioning from the Republican-controlled committee, which is currently chaired by Jordan, a longtime Trump ally who was a staunch defender of the president during both impeachment inquiries.

Democrats on the panel said they wanted to know more about Smith’s findings.

“We want to hear what exactly he found and did,” House Judiciary Rep. Jamie Raskin, the top Democrat, told Politico.

The special prosecutor volunteered to testify at the public hearing, according to Smith’s attorney, Peter Kosky.

Kosky told POLITICO earlier this month that Smith was “disappointed that the proposal has been rejected and that the American people will be deprived of the opportunity to hear directly from Jack on these topics.”

The stakes are high for Smith, who Trump has deemed a “criminal” and suggested he should be “investigated and jailed” along with other Justice Department officials involved in the 2020 election investigation.

In September, the Justice Department indicted former FBI Director James Comey based on his 2019 testimony to Congress. In November, a federal judge dismissed the case after finding that the prosecutor who brought the case was improperly appointed.