Republican Government Officials Infected with "Mystery Bug" PHILADELPHIA - Health officials are investigating an outbreak of illnesses at a Philadelphia hotel that recently played host to about 200 Republican leaders, including President Bush. At least 69 guests at the Loews Philadelphia Hotel - all attending a business conference - went to the hospital last week when a mystery bug caused dizziness and vomiting. More fell ill, but did not seek medical attention. In addition, two people at a GOP retreat to discuss party policy Jan. 29-31 - a member of House Speaker Dennis Hastert's staff and a second staff member's...