State Sen. Matt Smith is leaving the Legislature to become president of the Greater Pittsburgh Chamber of Commerce. Smith, a Mt. Lebanon Democrat who is in his first term representing the 37th District in the South Hills, will resign from the Senate in the coming month, according to a news release from Senate Minority Leader Jay Costa. There was no official word from the Greater Pittsburgh Chamber of Commerce, which has been without permanent leadership since DeWitt Peart left for a job in Austin,...