[NOTE CORRECTED DCART NUMBER For Friday ATC] With three weeks to go before the Republican state convention, St. Paul mayor Norm Coleman says he's "optimistic" he's going to get the party's endorsement for Governor. But the Coleman campaign is careful not to declare victory too soon: campaign manager Chris Georgacas says he thinks the other two Republican front-runners, Joanne Benson and Allen Quist, may join forces. A socially-conservative, outstate coalition could be enough to stop the Coleman campaign in its tracks. Minnesota Public Radio's Martin Kaste takes a closer look at the race for the Republican endorsement: ((convention sfx, Coleman's voice in distance: "Hi, I'm N