WASHINGTON — The Republican House Judiciary Committee chairman walked off with the gavel Friday, leaving Democrats shouting into turned-off microphones at a raucous hearing on the Patriot Act. The hearing, with the two sides accusing each other of being irresponsible and undemocratic, came as President Bush was urging Congress to renew the sections of the post-Sept. 11 counter-terrorism law set to expire in September. Rep. F. James Sensenbrenner Jr. (R-Wis.), chairman of the panel, abruptly gaveled the meeting to an end and walked out, followed by other Republicans. Sensenbrenner said that much of the testimony, which veered into debate over...