Supporters of a new St. Paul ballpark plan to send area civic leaders on tours of several new retro-style ballparks hoping they'll come back ready to drum up enthusiasm for the local proposal. Mayor Norm Coleman's staff is considering trips to Jacob's Field in Cleveland, Camden Yards in Baltimore and Coors Field in Denver. The cheer leaders have their work cut out for them. Polls have consistently shown Minnesotans are overwhelmingly against building a new baseball stadium. Ed Schiappa, a professor of communication studies at the University of Minnesota, has written a book on the stadium debate in Minnesota. He says this lastest push isn't likely to fare much better than the last one.