LAKE GENEVA, Wis. - Tommy Thompson cited a dead hearing aid and an urgent need to use the bathroom in explaining on Saturday why he said at a GOP presidential debate that an employer should be allowed to fire a gay worker. Speaking to reporters after giving an address at the state GOP convention, Thompson also said he was suffering from the flu and bronchitis and had been admitted to a hospital emergency room three days prior to the May 3 debate. "Nobody knows that," Thompson said. "I've been very sick. ... I was very sick the day of the...