Photo: Jabin Botsford/The Washington Post via Getty Images

President Trump's White House has the highest turnover rate in top-level positions of any administration in history, according to a new study by the Brookings Institution.

Why it matters: Turnover can lead to inefficiency on several fronts, Kathryn Dunn Tenpas, the study's author, wrote last year. For every person that leaves, a replacement needs to be hired and caught up to speed. Replacements also tend to bring their own deputies and trusted staff, which leads to a domino effect of new hires.

By the numbers: Trump's administration had turnover in 78% of its 65 most influential non-Cabinet-level positions, referred to in the report as "the A Team." (Tenpas described the methodology for determining the A Team's members.)

  • 51 of those 65 positions have had turnover.
  • 31% of those positions have turned over more than once.

The big picture: Within the Cabinet, 9 of the 15 positions have had turnover. That's more than any of the last 5 presidents.

  • The only president to come close was George H.W. Bush with 8 Cabinet changes, but that was over his entire 4-year term.

Between the lines: The turnover has been coupled with a lack of people in leadership positions across the executive branch.

  • Trump has not nominated people to fill 143 positions that need Senate confirmation, according to an online tracker by The Washington Post and Partnership for Public Service.

The bottom line: Tenpas told NBC News that the turnover situation can lead to "upheaval and chaos" within the administration, which can hinder the government's ability to operate successfully.

Go deeper: Every high-profile Trump administration departure

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Illustration: Sarah Grillo/Axios

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  2. Health: Hospitals face a crush — 13 states set single-day case records last week.
  3. Business: Winter threat spurs new surge of startup activity.
  4. Media: Pandemic causes TV providers to lose the most subscribers ever.
  5. States: Nearly two dozen Minnesota cases traced to three Trump campaign events.
  6. World: Putin mandates face masks.

Louisiana braces for 3rd hurricane in 2 months as Tropical Storm Zeta nears

Municipality workers clean the streets of garbage in Playa del Carmen, Mexico, on Tuesday that was left by Zeta, which struck the Yucatan Peninsula as a Category 1 Hurricane a day earlier — causing no major damage to infrastructure. Photo: Medios y Media/Getty Images

Tropical Storm Zeta is expected to strengthen back into a hurricane and bring dangerous storm surge conditions to parts of the northern Gulf Coast on Wednesday, per the National Hurricane Center.

The state of play: Louisiana Gov. John Bel Edwards (D) requested a pre-landfall Federal Declaration of Emergency in a letter to President Trump on Tuesday, ahead of the storm's expected arrival south of New Orleans.

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Trump's campaign website hacked

A screenshot of the Trump campaign website after it was hacked.

The Trump campaign website briefly went down and its "About" page was modified after hackers attacked the site Tuesday evening.

The big picture: With just seven days before the election, the hackers emulated the FBI and declared on the "About" page that: "this was seized. the world has had enough of the fake-news spreaded [sic] daily by president donald j trump. it is time to allow the world to know truth." Two addresses linked to the cryptocurrency Monero appeared on the site. Trump campaign spokesperson Tim Murtaugh in a statement said no sensitive data had been exposed in the attack.

Go deeper: Twitter hack raises fears of an unstable election