A high-level advisory group once seen as the best hope for crafting a bipartisan solution to the nation's budget ended up deadlocked, issuing a final report Wednesday that splits along party lines. The seven Republicans on the National Economic Commission and Robert Strauss, the one Democrat appointed by President Bush, endorsed Bush's pledge against raising taxes and praised his budget, calling it a "workable plan for eliminating the deficit" by 1993. However, the six Democrats appointed by the congressional leadership signed a minority report calling Bush's budget "neither theoretically sound nor politically realistic."