Update 11/20 at 10:44 PM EST: The Associated Press reports:
WASHINGTON - Attorney General Michael Mukasey collapsed during a speech Thursday night and was being taken to a hospital.
Associate Attorney General Kevin O'Connor said Mukasey began shaking while addressing the Federalist Society at a Washington hotel.
"He just started shaking and he collapsed," O'Connor said. "They're very concerned."
O'Connor said he did not know whether Mukasey, 67, had regained consciousness."
Mukasey was 20 minutes into his speech before he collapsed.
Best wishes to AG Mukasey and thoughts to his family.
UPDATE: An eyewitness account.