To provide a per diem allowance for Members of Congress for the costs of lodging, meals, and incidental expenses incurred because of travel to and from the Washington Metropolitan Area in order to cast votes in Congress, and for other purposes.

Every bill carries a core record (title, sponsor, latest action) that Concord fetches up front. The detailed sections — cosponsors, action history, subjects, titles, and summaries — live behind separate Congress.gov endpoints, so they're fetched on demand rather than for all 50,000+ bills at once. Until a bill has been enriched, those sections stay empty.