Decades of debate about allowing casino gambling in Kentucky may come to a crescendo Thursday in the state Senate, where Republican leaders say they will vote on a constitutional amendment to allow up to seven casinos. The move comes after the Senate State and Local Government Committee approved a revised version of the bill backed by Democratic Gov. Steve Beshear on a 7-to-4 vote Wednesday afternoon. It was the first time a Senate committee has approved a constitutional amendment to expand gambling.