Photo: Tolga Akmen/AFP/Getty Images

John Bolton's White House departure on Tuesday isn't the only hole in the Trump administration's national security apparatus.

Why it matters: The U.S., either on a diplomatic or military level, is currently engaged in conflicts with Iran, Venezuela, North Korea and Afghanistan — to name a few. The sheer volume of global hotspots that threaten U.S. national security demand some semblance of government stability.

The big picture: President Trump has had nearly 50 Cabinet or other high-profile departures during his first term, with Bolton being his 3rd national security adviser in less than 3 years. Trump has peppered his Cabinet with "acting" officials, who aren't beholden to the rigor of a Senate confirmation. He says he likes them because they give him "more flexibility."

Vacant positions:
  • National security adviser: The position is vacant following Bolton's resignation. Trump tweeted on Sept. 10 that he will announce a replacement next week. Bolton followed Lt. Gen. H.R. McMaster and Michael Flynn, who only lasted 24 days and is currently facing sentencing for lying to the FBI.
Positions under "acting" leadership:
  • Homeland Security secretary: Kevin McAleenan is leading the department after Kirstjen Nielsen's April resignation.
  • Director of national intelligence: Joseph Maguire took on the acting role after Dan Coats announced his resignation on July 28.
  • Secretary of the Army: Ryan McCarthy, the undersecretary of the Army, was nominated by Trump on Monday to take on the secretary role. Mark Esper, the current secretary of defense, served as the acting Army secretary after James Mattis' December 2018 resignation.
  • Secretary of the Air Force: Matthew Donovan is leading the department after former Sec. Heather Wilson resigned in March. Barbara McConnell Barrett is currently nominated for the position.

Go deeper: Trump's Cabinet vacancies have lasted way longer than other modern presidents

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Louisville officer: "Breonna Taylor would be alive" if we had served no-knock warrant

Breonna Taylor memorial in Louisville. Photo: Brandon Bell/Getty Images

Sgt. Jonathan Mattingly, the Louisville officer who led the botched police raid that caused the death of Breonna Taylor, said the No. 1 thing he wishes he had done differently is either served a "no-knock" warrant or given five to 10 seconds before entering the apartment: "Breonna Taylor would be alive, 100 percent."

Driving the news: Mattingly, who spoke to ABC News and Louisville's Courier Journal for his public interview, was shot in the leg in the initial moments of the March 13 raid. Mattingly did not face any charges after Kentucky Attorney General Daniel Cameron said he and another officer were "justified" in returning fire to protect themselves against Taylor's boyfriend.

U.S. vs. Google — the siege begins

Illustration: Sarah Grillo/Axios

The Justice Department fired the starter pistol on what's likely to be a years-long legal siege of Big Tech by the U.S. government when it filed a major antitrust suit Tuesday against Google.

The big picture: Once a generation, it seems, federal regulators decide to take on a dominant tech company. Two decades ago, Microsoft was the target; two decades before that, IBM.

Dion Rabouin, author of Markets
2 hours ago - Economy & Business

Why the stimulus delay isn't a crisis (yet)

Illustration: Aïda Amer/Axios

If the impasse between House Speaker Nancy Pelosi and the White House on a new stimulus deal is supposed to be a crisis, you wouldn't know it from the stock market, where prices continue to rise.

  • That's been in no small part because U.S. economic data has held up remarkably well in recent months thanks to the $2 trillion CARES Act and Americans' unusual ability to save during the crisis.