By Jeremy P. Jacobs - 07/01/09 11:52 AM EDT
Waxman was not feeling well and checked into the Cedars-Sinai Medical Center in Los Angeles, his spokesman told the AP. There, he received "routine testing" and is "feeling much better now."
As chairman of the House Energy and Commerce Committee, Waxman was a driving force behind the climate-change legislation that passed with 219 votes last Friday.
Waxman's office did not provide any additional details as far as when the congressman will be released.