At this point, Marine Week St. Louis is well underway. Leathernecks are out and about in the Gateway City, promoting the Marine Corps’ values, performing community service and answering questions about the military. All should be right with the world. Unfortunately, there’s a public relations snag today. Lt. Col. Shane Tomko, commander of the task force leading Marine Week, performed an on-air interview last night during a Phillies-Cardinals game. An apparent die-hard Cards fan, the salty head of 3rd Battalion, 24th Marines, out of St. Louis, made an observation about Phillies ace pitcher Roy Halladay that has blown up the…