The Congressional Budget Office estimates that approximately 750,000 federal employees will be furloughed each day of a government shutdown.

Why it matters: Those furloughed employees, as well as congressional staffers, will not receive paychecks, putting pressure on lawmakers and White House to find an agreement to reopen the government. • The daily cost of those employees' compensation will be "roughly 400 million," CBO Director Phillip Swagel wrote to lawmakers on Tuesday.

Driving the news: The government will shut down at midnight if Congress doesn't authorize a short-term spending stopgap. • The White House has warned that temporary furloughs could turn into permanent firings.

Zoom in: CBO is basing its estimates on the agencies' contingency plans and departments and the Office

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