(CNN) Former White House communications director Hope Hicks is not responding to any questions about her time at the White House in a closed-door congressional interview Wednesday, angering Democrats who say they expect to go to court to force her to answer their questions.

White House attorneys are objecting to all questions related to the White House, Democrats say, all the way down to where Hicks sat in the West Wing. But Hicks is answering questions about her time on the Trump campaign, which is not covered by executive privilege.

In questioning about the campaign, Hicks told lawmakers that she did not have knowledge during the 2016 campaign of the hush-money payments made in the run-up to the election, according to three sources with knowledge of her testimony.

Hicks has so far not answered questions about whether she was informed of the payments while working at the White House because the White House argued that fell under her time covered by their claim of immunity from congressional testimony, the sources said.

Hicks was asked by Democrats about her comments in a Wall Street Journal story about the payments to Playboy playmate Karen McDougal published before the election, in which she called the payments "totally untrue."

The White House is not asserting executive privilege, but arguing that Hicks has absolute immunity from testifying as a senior adviser to President Donald Trump. Democrats called that legal claim "ridiculous" and "absurd" as they signaled they will likely challenge it in court.

"There is no such thing as absolute immunity that prevents someone from answering questions about any subject related to their work in an administration. It just doesn't exist," said Rep. David Cicilline, a Rhode Island Democrat. "This is an ongoing effort by the president of the United States to obstruct, to prevent Congress from finding the facts and behaving as if he's above the law."

House Judiciary Chairman Jerry Nadler told reporters as he exited the interview, which is still ongoing, that she was answering some questions.

"Hope Hicks answered some questions. She gave us a lot of good information. The White House asserted so-called absolute immunity, which is ridiculous and which we'll destroy in court," Nadler said.

Although many questions from Democrats were not answered, Hicks did provide some responses, such as when she was asked about her House Intelligence Committee testimony from 2018 in which she said that she sometimes told white lies on behalf of the President.

Under Democratic questioning, Hicks told the panel that she never lied about anything "substantial," according to multiple sources. Hicks said that the lies were about small matters such as scheduling, which was similar to her previous testimony.

Still, it's not clear how fruitful the interview was, as multiple Democrats said they learned little from the testimony.

"Nothing new," said Rep. Steve Cohen, a Tennessee Democrat.

"Not too much," responded Rep. Zoe Lofgren of California when asked what she learned.

Hicks' appearance is the first time a member of Trump's inner circle is appearing before a Democratic committee investigating the President, which comes as Nadler's committee wrestles with whether to begin an impeachment inquiry.

Trump weighed in on Hicks' interview on Twitter Wednesday, accusing Democrats of "extreme presidential harassment."

"The Dems are very unhappy with the Mueller Report, so after almost 3 years, they want a Redo, or Do Over. This is extreme Presidential Harassment," Trump tweeted. "They gave Crooked Hillary's people complete Immunity, yet now they bring back Hope Hicks."

He followed up with another tweet Wednesday afternoon, accusing Democrats of " putting wonderful Hope Hicks through hell."

Republicans criticized Democrats for trying to interview Hicks in the first place. Rep. Steve Chabot, an Ohio Republican, called the interview a "total waste of time" as he left the room. And Georgia Rep. Doug Collins, the ranking Republican on the committee, called Hicks' appearance merely an attempt from Democrats to generate a "press release."

"We're hearing a dramatic reading of the Mueller report, but nothing new," Collins said when asked if he had learned anything.

The White House's objections to Democrats' questions were expected, as White House Counsel Pat Cipollone sent the House panel a letter Tuesday evening arguing that Hicks was immune from testifying about her time at the White House as one of the President's senior advisers, citing executive privilege protections.

"Because of this constitutional immunity, and in order to protect the prerogatives of the Office of President, the President has directed Ms. Hicks not to answer questions before the Committee relating to the time of her services as a senior adviser to the President," Cipollone wrote.

Asked Tuesday about the White House instructing Hicks not to answer questions, House Speaker Nancy Pelosi said: "Obstruction of justice."

Democrats' decision to focus on the hush-money payments in addition to obstruction of justice underscores that the committee is broadening the focus of its probe into the President -- which Nadler has said the panel is undertaking before a decision is made on impeachment, to go beyond the episodes outlined in the Mueller report.

Still, the committee is eager to speak to Hicks about her time at the White House. Committee aides said there were five episodes Mueller documented that they wanted to press Hicks about, including the firing of then-national security adviser Michael Flynn , the firing of then-FBI Director James Comey, former Attorney General Jeff Sessions' recusal from the Mueller probe and Trump's efforts to dismiss Mueller from overseeing the probe and to curtail the special counsel's investigation.

The committee plans to release a transcript of Hicks' interview afterward, potentially within 48 hours. The Judiciary Committee wants to bring in witnesses to talk about the Mueller report publicly, but so far it has held only open hearings with experts.

"I hope eventually she and all witnesses will be in the public," said Rep. Madeleine Dean, a Pennsylvania Democrat on the committee. "It's our job. I really believe it's our job to get the facts before the American public. ... The best, most effective way to do our oversight is to make sure it's in the public."

Also looming: whether the committee will interview Mueller himself publicly -- and if it will need a subpoena to do so. Nadler declined to comment on those negotiations Tuesday.

Republicans argued that Hicks' interview is proof that Democrats' claims of White House stonewalling are overblown.

"Judiciary Democrats have been their own barrier to information by choosing to escalate instead of negotiate at every turn," Collins said. "The White House has offered to negotiate with Democrats for documents that Ms. Hicks can't provide, and the committee could probably have heard from her earlier if Democrats didn't take a scorched-earth approach to pursuing information."

Hicks has previously testified behind closed doors before the House and Senate Intelligence committees, and she left her job at the White House the day after appearing before the House panel. At those interviews, Hicks also did not discuss her time at the White House, Cipollone wrote.

Democrats have argued that Hicks cannot claim executive privilege when she spoke to the special counsel's office about the same topics, but the Trump administration has countered that being interviewed in an executive branch investigation does not waive privilege for a legislative branch probe. That question is also one that's likely to end up in court for a number of witnesses the panel is seeking to interview.

One potential point of contention is the presidential transition before Trump took office. Although Democrats -- and some Republicans, like former Rep. Trey Gowdy of South Carolina -- have argued that executive privilege does not apply to the transition, Cipollone argued in his letter Tuesday that Hicks' transition work would likely be privileged because it involved decisions that would be made after Trump was inaugurated.

This story has been updated with additional developments.