House China Select Committee Chair John Moolenaar said he still wants Jensen Huang to appear before Congress, even after Huang stepped down Thursday as Nvidia’s chief executive, president and board chair.

“We are in discussions with him right now on a date to come and meet with us,” Moolenaar, a Michigan Republican, told reporters.

Moolenaar said he and two other Republican committee chairs—House Intelligence Chair Rick Crawford of Arkansas and House Foreign Affairs Chair Brian Mast of Florida—are prepared to subpoena Huang if they cannot agree on a date for his appearance.

The three lawmakers sent Huang a letter last week summoning him to Capitol Hill. Moolenaar said they received a response Wednesday, but he declined to provide further details about it.

Nvidia’s board announced Huang’s departure Thursday morning and named Chief Financial Officer Colette Kress as interim CEO. The leadership change has not altered Moolenaar’s interest in questioning the former executive about issues involving China and Nvidia’s business.

Moolenaar said he wants the hearing to explore how Chinese intelligence operated and what information was accessed. He also wants to examine Huang’s lobbying for policy changes on Nvidia’s behalf, including policies governing exports of the company’s cutting-edge chips.

Democrats are also considering further congressional scrutiny. Rep. Gregory Meeks of New York, the top Democrat on the House Foreign Affairs Committee, said Thursday that he had not yet spoken with Mast but was preparing to create a subcommittee in the next Congress focused on questions surrounding the fallout from Huang’s affairs.

“We may very well be setting up a subcommittee just focused on some of this stuff because that's how important and significant it is,” Meeks said. He added that he wanted to approach the matter on a bipartisan basis.

“I can guarantee you,” Meeks told reporters, “Come Jan. 4, there will be some hearings.”

Nvidia did not immediately respond to a request for comment.