House Judiciary Committee Chairman Jerrold Nadler had to receive medical attention Friday after a health scare at an event in New York City.

Despite reports that the powerful New York Democrat appeared to pass out, his office said he merely felt ill but did not faint. A spokesman for Nadler told Fox News that the congressman is “okay” and “seems to have been dehydrated,” describing the room as “very warm.”

Nadler, 71, was speaking at a press conference on the Upper West Side of Manhattan, alongside 2020 Democratic hopeful New York City Mayor Bill de Blasio, when the incident happened. De Blasio could be seen checking on him and patting him on the shoulder, as someone brought over a glass of water.

Fox News is told the congressman was being taken to a hospital in an ambulance.

“He is now responsive and receiving a check-up,” a spokesman told Fox News.

Nadler’s office noted that he was sitting down, so he “did not faint or anything.”

But local reporters on social media attending the event said that Nadler appeared to have briefly passed out.

Later, Nadler, on Twitter, said he was feeling "much better."

"Appreciate everyone's concern. Was very warm in the room this morning, was obviously dehydrated and felt a bit ill. Glad to receive fluids and am feeling much better. Thank you for your thoughts," he tweeted.

Nadler's committee is currently battling with the Trump administration over access to an unredacted version of Special Counsel Robert Mueller's Russia report. Earlier this month, his panel voted to hold Attorney General Bill Barr in contempt of Congress for defying a subpoena for the full report and its underlying documents and evidence.

Nadler, as judiciary committee chairman, would also oversee any impeachment proceedings should Democrats launch them -- a question that has divided the party.

Fox News' Chad Pergram contributed to this report.