President Trump Donald John TrumpSteele Dossier sub-source was subject of FBI counterintelligence probe Pelosi slams Trump executive order on pre-existing conditions: It 'isn't worth the paper it's signed on' Trump 'no longer angry' at Romney because of Supreme Court stance MORE’s onetime business associate Felix Sater is set to testify privately before the House Intelligence Committee on Tuesday after missing an earlier scheduled appearance.

Sater’s attorney Robert Wolf confirmed the closed-door appearance, which was first reported by other outlets, in an email to The Hill. A spokesman for the House Intelligence Committee declined to comment Monday evening.

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The committee subpoenaed Sater to appear for an interview after he failed to show up for a planned voluntary appearance in June. At the time, Sater’s attorney said he did not show up because of “unexpected health reasons.” Sater also told a handful of news outlets at the time that he overslept.

The Intelligence Committee sought Sater’s testimony as part of its wide-ranging investigation into Russian interference and Trump’s business dealings in Russia.

The committee is interested in Sater, the former managing director for the New York-based real estate firm Bayrock Group, because he worked with former Trump attorney Michael Cohen Michael Dean CohenJudge orders Eric Trump to comply with New York AG's subpoena before Election Day A huge deal for campaign disclosure: Trump's tax records for Biden's medical records Our Constitution is under attack by Attorney General William Barr MORE to broker plans to build a Trump real estate property in Moscow during the 2016 presidential campaign.

The property plans never came to fruition, but they attracted scrutiny from former special counsel Robert Mueller Robert (Bob) MuellerCNN's Toobin warns McCabe is in 'perilous condition' with emboldened Trump CNN anchor rips Trump over Stone while evoking Clinton-Lynch tarmac meeting The Hill's 12:30 Report: New Hampshire fallout MORE and congressional investigators because of their timing. As part of a deal to cooperate with Mueller’s investigation, Cohen pleaded guilty to lying to Congress about the duration of the property discussions within the Trump Organization. He is currently serving a three-year prison term for that and other crimes.

Trump, who didn’t disclose the property plans during the campaign, signed a letter of intent to pursue the project but ultimately did not go through with it. Sater’s involvement in the real estate project is detailed in Mueller’s report.

Sater was initially slated to testify publicly before the committee in March following Cohen’s closed-door interview, but his testimony was twice postponed.