Jennifer Arangio, a top National Security Council official, is out. She reportedly clashed with other Trump administration officials, including Stephen Miller, over the White House’s hardline immigration policies and attitude towards refugees.

Arangio isn’t the only high-profile figure to be shown the exit in recent weeks. At the start of the month, President Donald Trump announced the resignation of scandal-plagued EPA Administrator Scott Pruitt. And Politico reported on Thursday that legislative affairs director Marc Short is planning to step down before the end of the month, just as Trump gears up for a fight on Capitol Hill over his Supreme Court nominee.

In early spring, the administration was bleeding officials by the week and everyone else seemed on the verge of getting ousted. But a lull had set in since — until Pruitt’s departure. Still, Trump has had the most Cabinet-level staff turnover at this point in his presidency than any other president in the past 100 years, according to the Associated Press.

Arangio’s departure, which was first reported by Politico, marks the latest in a string of NSC exits since John Bolton took over as national security adviser in March. Homeland security adviser Tom Bossert left his post in April, the day after Bolton started his new job. Politico reported that just two days before Arangio’s ouster, two senior officials exited the NSC’s Middle East division.

With Arangio the latest to leave, here’s a look at everyone else who’s resigned, or been fired, in the first 18 months of the Trump administration.

Jennifer Arangio, senior director for international organizations and alliances at the National Security Council

Arangio is a former Capitol Hill staffer who, according to her LinkedIn profile, served as the national director of women engagement in the final stretch of Trump’s 2016 campaign and joined the NSC after his inauguration. CNN reports that Arangio clashed with other White House officials, including top Trump aide and immigration restrictionist Stephen Miller, on the issue of refugees admissions to the United States.

Marc Short, White House legislative affairs director

Trump has lost a long-time aide and liaison to Capitol Hill. Short, who previously worked as an aide for Vice President Mike Pence shepherded the president’s agenda on Capitol Hill, chalking up a major victory with the tax bill, but falling short on Obamacare repeal. He’s leaving the White House for the private sector and a teaching gig at the University of Virginia.

Short’s departure isn’t that surprising — it had been rumored for some time, though that was before a potential Supreme Court battle. The White House told the Washington Post that Shahira Knight, an aide on the National Economic Council, will take over Short’s job.

Scott Pruitt, EPA administrator

Scandal after scandal after scandal finally got to be too much. Trump said Thursday that he accepted Pruitt’s resignation. Andrew Wheeler, his deputy, will take over and likely continue Pruitt’s anti-regulatory crusade.

I have accepted the resignation of Scott Pruitt as the Administrator of the Environmental Protection Agency. Within the Agency Scott has done an outstanding job, and I will always be thankful to him for this. The Senate confirmed Deputy at EPA, Andrew Wheeler, will... — Donald J. Trump (@realDonaldTrump) July 5, 2018

...on Monday assume duties as the acting Administrator of the EPA. I have no doubt that Andy will continue on with our great and lasting EPA agenda. We have made tremendous progress and the future of the EPA is very bright! — Donald J. Trump (@realDonaldTrump) July 5, 2018

Joe Hagin, White House deputy chief of staff

Trump lost one of his most seasoned aides, and one of the few staffers with a long résumé of White House service. Hagin, who announced plans to depart in June, helped plan Trump’s Singapore summit, and somehow lasted more than a year, though he was reportedly distrusted by Trump loyalists because of his ties to the Bush family.

Rear Adm. Timothy Ziemer, National Security Council senior director for global health security

Ziemer, who led the President’s Malaria Initiative under both George W. Bush and Barack Obama, departed the National Security Council after his department was eliminated in an organizational shakeup in May.

Ty Cobb, White House special counsel

Cobb, one of the president’s top attorneys in the Mueller probe, stepped down in May. Reports suggested that others on Trump’s legal team wanted someone more aggressive as the special counsel investigation headed into its second year.

Tom Bossert, homeland security adviser

Bossert announced that he was leaving his post in April. His abrupt departure is likely a consequence of National Security Adviser John Bolton’s arrival, who wanted to build his own team.

Michael Anton, National Security Council spokesperson

Anton is probably best known for his essay, published under a pseudonym, that called 2016 the “Flight 93” election. The essential argument was that the US was on the verge of destruction like the doomed 9/11 plane; electing Hillary Clinton would hasten its demise, but Trump might be able to take control of the metaphorical plane and avert disaster.

Trump’s defenders seized on the argument, and Anton joined the National Security Council under the first national security adviser, Michael Flynn. He stayed on as an NSC spokesperson during H.R. McMaster’s tenure. His departure coincided with the arrival of the hawkish John Bolton.

David Shulkin, secretary of veterans affairs

Shulkin had been the frontrunner in the competition over the next Cabinet member to go. Trump made it official with a tweet. Shulkin is one of several Cabinet officials who have faced ethics questions over misuse of taxpayer funds, with his relating to an expensive European trip.

H.R. McMaster, national security adviser

After weeks of speculation, McMaster left the White House after a little more than a year, and was replaced by former United Nations Ambassador John Bolton. McMaster wasn’t Trump’s first choice, and their working relationship was at times fraught.

I am pleased to announce that, effective 4/9/18, @AmbJohnBolton will be my new National Security Advisor. I am very thankful for the service of General H.R. McMaster who has done an outstanding job & will always remain my friend. There will be an official contact handover on 4/9. — Donald J. Trump (@realDonaldTrump) March 22, 2018

Andrew McCabe, FBI deputy director

The Trump administration fired McCabe a day before he was set to retire with a full pension after a 21-year career. McCabe’s dismissal came after a report from the Department of Justice inspector general that found McCabe was not candid about his interactions with reporters. McCabe had stepped away from his job in January after months of attacks from Trump and his allies over a controversy involving his wife’s alleged ties to Hillary Clinton and her supporters.

Rex Tillerson, secretary of state

Tillerson was ousted on March 13 and replaced by CIA Director Mike Pompeo amid various clashes with President Trump.

Mike Pompeo, Director of the CIA, will become our new Secretary of State. He will do a fantastic job! Thank you to Rex Tillerson for his service! Gina Haspel will become the new Director of the CIA, and the first woman so chosen. Congratulations to all! — Donald J. Trump (@realDonaldTrump) March 13, 2018

John McEntee, Trump’s personal assistant

McEntee, President Trump’s personal assistant, was escorted out of the White House on March 12, according to the Wall Street Journal, after being fired over an unspecified security issue.

Gary Cohn, director of the National Economic Council

Cohn resigned as the Trump administration appeared ready to move ahead on tariffs, a policy he opposed.

Josh Raffel, deputy White House communications director

Raffel, who worked closely with Jared Kushner and Ivanka Trump, left amid speculation about Kushner’s status within the administration.

Hope Hicks, White House communications director

Hicks, one of Trump’s closest and longest-serving aides, resigned in February after a turbulent few weeks.

Rachel Brand, associate attorney general

Brand, the No. 3 official at the Justice Department, resigned after nine months. She left for a job in the private sector, but she departed amid Trump’s continued attacks on the Justice Department and federal law enforcement.

Rob Porter, White House staff secretary

Porter resigned amid domestic abuse allegations and revelations that despite controlling the paper flow of sensitive documents to Trump’s desk, he had not obtained a long-term security clearance.

Brenda Fitzgerald, director of the Centers for Disease Control and Prevention

Fitzgerald resigned amid allegations of a conflict of interest; she had purchased shares in a tobacco company a month before assuming her job.

Rick Dearborn, deputy White House chief of staff

Dearborn stepped down for a job in the private sector around the one-year mark of Trump’s tenure.

Omarosa Manigault-Newman, director of communications for the White House Office of Public Liaison

Manigault-Newman resigned (though early reports suggested she was fired in dramatic fashion) to “pursue other opportunities,” which included CBS’s reality TV show Celebrity Big Brother.

Dina Powell, deputy national security adviser

One of the so-called “adults in the room,” Powell had been working closely with Middle East policy and departed the White House around the one-year mark.

Tom Price, secretary of health and human services

Price resigned amid mounting scandals, including his use of taxpayer money to charter flights and his investments in health care stocks, which raised questions about conflicts of interest.

Sebastian Gorka, deputy assistant to the president focusing on national security and terrorism

Gorka said he resigned; the White House implied he was fired. Either way, the controversial adviser — he was linked to far-right Hungarian groups — parted ways with the administration in August and began making regular appearances on Fox News.

Steve Bannon, White House chief strategist

Trump’s firebrand populist adviser left the White House in August 2017 following months of turmoil and his penchant for talking to reporters.

Carl Icahn, special adviser to the president on regulatory matters

Icahn said he had stopped advising Trump in August 2017, though he also claimed he never had a formal role with the administration. The billionaire friend of Trump’s was plagued by conflict of interest questions before he relinquished his role.

Sean Spicer, White House press secretary

The embattled and increasingly sidelined press secretary resigned in July 2017 after Anthony Scaramucci was appointed White House communications director. Speaking of which...

Anthony Scaramucci, White House communications director

In what might be the record for shortest tenure, Scaramucci was fired after just 10 days at his job in the White House. He was reportedly ousted by Chief of Staff John Kelly, though an expletive-laced interview probably didn’t help.

Reince Priebus, White House chief of staff

Priebus said he resigned, though it appeared he was unceremoniously ousted after Trump announced his successor, John Kelly, on Twitter and reportedly kicked him out of the presidential motorcade. Priebus’s departure wasn’t a surprise; weeks of reports suggested Trump was on the verge of axing him.

Walter Shaub, director of the Office of Government Ethics

Shaub, the ethics watchdog appointed during President Barack Obama’s second term, resigned in July. He had sharply criticized the Trump administration over ethics questions; he’s now working with an outside ethics watchdog.

James Comey, FBI director

You probably know this one by now. Trump officially fired Comey because of his handling of the Hillary Clinton email investigation, but he later admitted it was because he was angry about the Russia investigation. The fallout from Comey’s firing precipitated the appointment of special counsel Robert Mueller.

Michael Dubke, White House communications director

The first, but definitely not the last, communications director to resign. He lasted about three months.

Vivek H. Murthy, surgeon general

Murthy, an Obama administration holdover, was asked to resign by the Trump administration.

K.T. McFarland, deputy national security adviser

McFarland was forced out after H.R. McMaster took over as national security adviser. She was nominated as ambassador to Singapore but withdrew her nomination in February because she’s come under scrutiny in Mueller’s probe.

Katie Walsh, White House deputy chief of staff

Walsh, an ally of Priebus’s, left the administration after about two months to work for an outside pro-Trump group. Walsh’s notoriety rose months after her departure, and she was widely quoted in Michael Wolff’s Fury and Fury on the White House dysfunction (some of which she disputes).

Michael Flynn, national security adviser

Flynn resigned under increasing pressure after it appeared he lied to Vice President Mike Pence and the FBI about his contacts with Russians during the presidential transition. He has since pleaded guilty to lying to the FBI in special counsel Mueller’s investigation into the Trump campaign and Russian interference in the 2016 elections.

Preet Bharara, US attorney for the Southern District of New York

Attorney General Jeff Sessions asked for the resignations of all 46 Obama-appointed US attorneys — a customary practice when a new president takes office. But Bharara’s case stood out because Trump had reportedly asked him to stay on during the transition. Bharara refused to resign; Trump fired him.

Sally Yates, acting attorney general

An Obama administration holdover, Yates was fired after she refused to defend Trump’s executive order that temporarily barred people from seven predominantly Muslim countries from traveling to the US.