Businesses that contract with the federal government lost $12 billion in the first four weeks of the government shutdown , according to a report from the U.S. Chamber of Commerce released Thursday.

The report , which the Chamber is sending to members of Congress , shows that 65,500 small businesses across the United States are losing around $3 billion per week from the shutdown.

Companies affected by the shutdown include providers of high-tech machinery, office supplies, and landscaping services, according to the report, which was shared with CNBC before its public release.

Maryland and Virginia have the most government contractors at risk from the shutdown, according to the report.

But other states, including Alabama, California, Florida, and Texas, also have significant num

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