The Senate, under the leadership of President Thomas V. Mike Miller, a chief booster of the Prince George's casino, quickly passed a gambling expansion bill that included tax rate reductions for existing casinos and other concessions, such as allowing 24-hour operations. The House of Delegates, more skeptical of gambling and more receptive to the intense lobbying by Mr. Cordish, was a different story. Many in that chamber had balked at the idea of cutting taxes for casino owners in the same year that they had increased income taxes for about a fifth of Maryland households. But with pressure mounting, the House Ways and Means Committee suddenly reversed itself and voted in favor of a bill that included even bigger tax cuts than the Senate did. That proposal was voted out of the House of Delegates the next day and sailed through the Senate with little debate. Governor O'Malley signed it without delay.