The Bush administration is working on a spate of rules it hopes to finalize before its time in power expires. The last-minute rules cover a broad range of policy, but many share a common trait: relaxing existing requirements on businesses. The Bush administration appears to be pushing to deregulate in areas like environmental protection, worker leave, and auto safety. Many of the controversial rules are expected to be finalized in the coming weeks. The administration is pushing to finalize rules in November, not January, in order to assure they cannot be undone by the next president.