The Democratic-led House Intelligence Committee privately grilled President Trump's former attorney Michael Cohen for nearly eight hours Thursday, capping a weeklong marathon of closely-watched appearances on Capitol Hill.

Lawmakers were tight-lipped about the closed-door discussions, but some signaled it yielded new information relevant to the panel’s revived probe into Russian interference in the 2016 election.

It also ended with the promise for Cohen to return to complete the testimony next Wednesday -- forecasting more headaches for the White House as the president’s onetime ally and “fixer” continues public appearances in Washington.

“We had a long day, but it wasn’t a long enough day,” Chairman Adam Schiff Adam Bennett SchiffChris Matthews ripped for complimenting Trump's 'true presidential behavior' on Ginsburg Trump casts doubt on Ginsburg statement, wonders if it was written by Schiff, Pelosi or Schumer Top Democrats call for DOJ watchdog to probe Barr over possible 2020 election influence MORE (D-Calif.) told reporters after the interview concluded at roughly 5 p.m.

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“And I think we all feel it was a productive interview today where he was able to shed light on a lot of issues that are core to our investigation. We were able to drill down in great detail,” continued Schiff, who said they plan to publicly release his transcript sometime in the future.

Schiff also revealed Thursday the committee would publicly question Trump business associate Felix Sater, who was involved in efforts with Cohen to build a Trump property in Moscow, on March 14.

Cohen, who has cooperated in 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’s investigation into Russian interference, is expected to help the committee shine light on questions about Trump and his associates’ ties to Russia.

Cohen, who appeared tired as he emerged the secure room after the interview concluded and declined to answer questions, told reporters that he set out to tell the truth and that “there is more to discuss.”

Cohen has become a focus of Democrats in Congress after he pleaded guilty to a series of crimes last year and implicated Trump in a scheme to pay off women who alleged affairs with Trump before the 2016 election.

Last November, Cohen also pleaded guilty to lying to both the House and Senate Intelligence Committees about plans to build a the property in Moscow, and agreed to cooperate in Mueller’s probe. For one, Cohen admitted that the talks extended into June 2016 -- six months later than he initially testified and at which point Trump was the presumptive GOP nominee.

“I’m really convinced he is going to play a major role in helping us truly understand what happened, what role the president played during the campaign in terms of Russian interference and into his presidency,” Rep. Val Demings Valdez (Val) Venita DemingsFlorida Democrat introduces bill to recognize Puerto Rico statehood referendum Sunday shows - Trump team defends coronavirus response Demings slams GOP coronavirus relief bill: Americans 'deserve more than the crumbs from the table' MORE (D-Fla.) told The Hill during break from the interview to vote House floor about an hour and a half in.

But lawmakers offered few details on what was discussed, as is typical with closed-door interviews in sensitive investigations.

“We talked about a lot of things,” Rep. Jackie Speier Karen (Jackie) Lorraine Jacqueline SpeierOvernight Defense: House to vote on military justice bill spurred by Vanessa Guillén death | Biden courts veterans after Trump's military controversies House to vote on 'I Am Vanessa Guillén' bill Overnight Defense: Trump's battle with Pentagon poses risks in November | Lawmakers launch Fort Hood probe | Military members can't opt out of tax deferral MORE (D-Calif.) said about an hour before the interview wrapped, but added that the committee had only gotten through “a quarter” of its questions.

“We are just now getting into some of the more substantive issues,” she said.

Rep. Chris Stewart Christopher (Chris) Douglas StewartAtlanta Wendy's 911 call the night of Rayshard Brooks's death released Tyler Perry offers to pay for funeral of Rayshard Brooks Current, former NHL players form diversity coalition to fight intolerance in hockey MORE (R-Utah) also acknowledged that the committee was “learning some new things.”

But some signs suggested partisan divides -- which consumed the Intelligence panel in its first Russia investigation that Republicans abruptly shuttered last year -- could again fester in the new Congress.

“Ugly -- not with Cohen, but with ours,” Rep. Mike Quigley Michael (Mike) Bruce QuigleyDemocrats introduce legislation to revise FDA requirements for LGBT blood donors Tucker Carlson sparks condemnation with comments about deadly Kenosha shooting Hillicon Valley: Three arrested in Twitter hack | Trump pushes to break up TikTok | House approves 0M for election security MORE (D-Ill.) said while heading to vote partway into the interview.

Lawmakers and committee staff both took turns questioning Cohen, with Rep. John Ratcliffe John Lee RatcliffeOvernight Defense: Top admiral says 'no condition' where US should conduct nuclear test 'at this time' | Intelligence chief says Congress will get some in-person election security briefings FBI chief says Russia is trying to interfere in election to undermine Biden The Hill's Morning Report - Sponsored by The Air Line Pilots Association - Trump contradicts CDC director on vaccine, masks MORE (Texas), the only new Republican on the committee and a former prosecutor, taking the lead on questioning for the GOP members.

Cohen’s appearance before the House Intelligence Committee followed his explosive public testimony before the House Oversight Committee, during which he detailed what he described as nefarious and illegal behavior by his former boss.

Lawmakers’ questions largely focused on the president’s conduct and and business, and particularly Cohen’s allegations about Trump’s involvement in a scheme to pay off women who claimed they had affairs with him before the election.

The hearing did, however, yield some new tidbits relevant to probes into links between Trump and Moscow and the possibility his campaign coordinated with the Kremlin to meddle in the 2016 election.

For one, Cohen testified that he did not have “direct evidence” that Trump or his campaign colluded with the Russians but that he had his “suspicions.”

Cohen said he believed Trump had advanced knowledge of the 2016 Trump Tower meeting that is eldest son, Donald Trump Jr. Don John Trump'Tiger King' star Joe Exotic requests pardon from Trump: 'Be my hero please' Zaid Jilani discusses Trump's move to cancel racial sensitivity training at federal agencies Trump International Hotel in Vancouver closes permanently MORE, arranged with a Russian lawyer after being offered damaging information on Hillary Clinton Hillary Diane Rodham ClintonButtigieg stands in as Pence for Harris's debate practice Senate GOP sees early Supreme Court vote as political booster shot Poll: 51 percent of voters want to abolish the electoral college MORE.

Trump seized on that detail in remarks to reporters in Hanoi Thursday, labeling Cohen a liar but saying he was a “little impressed” that Cohen “didn’t lie” on collusion. The president has long denied his campaign colluded with Moscow and derided Mueller’s investigation as a “witch hunt.”

“He lied about so many different things. I was actually impressed that he didn’t say, ‘well I think there was collusion for this reason or that,’” Trump said.

Cohen also claimed he overheard a phone conversation between Trump and Roger Stone Roger Jason StoneThe agony of justice Our Constitution is under attack by Attorney General William Barr Justice IG investigating Stone sentencing: report MORE in which the longtime Republican operative said he had talked to WikiLeaks founder Julian Assange and that they were planning to release a tranche of Democratic emails that would hurt the Clinton campaign.

Both WikiLeaks and Stone, who is entangled in the special counsel’s investigation, have disputed Cohen’s account.

Cohen said Trump did not direct him to lie to Congress about plans to build a Trump property in Moscow, but gave him cues to do so. Cohen also suggested that Trump’s attorneys made changes to his 2017 congressional statement about the timing of the talks, which Trump lawyer Jay Sekulow firmly denied that later Wednesday.

Cohen also revealed that he briefed the Trump family about a half-dozen times on the plans between January and June of that year and that Trump asked him for updates. Cohen also testified that he discussed the plans with Trump Jr. and Ivanka Trump Ivana (Ivanka) Marie TrumpSpecial counsel investigating DeVos for potential Hatch Act violation: report Trump, Biden vie for Minnesota Trump luxury properties have charged US government .1M since inauguration: report MORE, the president’s daughter.

Cohen spent three days on Capitol Hill this week testifying publicly and privately on Trump, all while the president was overseas meeting with North Korean Leader Kim Jong Un on denuclearization. He also testified before the Senate Intelligence Committee in connection with its Russia investigation.

Cohen worked for Trump for roughly a decade in roles at the Trump Organization and as his personal lawyer, but their relationship fractured dramatically last year. Cohen pleaded guilty to tax evasion, a campaign finance violation and other crimes and implicated Trump in a hush-money scheme. The president has denied wrongdoing and labeled his onetime confidante a “rat” lying to investigators to reduce his prison time.

Cohen is slated to report to federal prison in May to serve a three-year sentence.