Sen. Christopher Coons Christopher (Chris) Andrew CoonsMurkowski: Supreme Court nominee should not be taken up before election Battle lines drawn on precedent in Supreme Court fight Sunday shows - Ruth Bader Ginsburg's death dominates MORE (D-Del.) said Monday that the number of acting secretaries in President Trump Donald John TrumpOmar fires back at Trump over rally remarks: 'This is my country' Pelosi: Trump hurrying to fill SCOTUS seat so he can repeal ObamaCare Trump mocks Biden appearance, mask use ahead of first debate MORE's Cabinet is "striking" following the resignation of Kirstjen Nielsen Kirstjen Michele NielsenDHS IG won't investigate after watchdog said Wolf, Cuccinelli appointments violated law Appeals court sides with Trump over drawdown of immigrant protections Democrats smell blood with new DHS whistleblower complaint MORE at the Department of Homeland Security.

“It's striking how many of the secretaries of the largest departments of this government are acting at this point,” Coons said on CNN's "New Day."

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Coons also said Nielsen would be remembered for her role in the administration's "zero tolerance" immigration policy, which resulted in children being separated from their families at the border, rather than her background in cybersecurity.

“It has to raise the question for anyone who is offered a Cabinet opportunity with President Trump whether their reputation will survive.”

"It's striking how many of the secretaries...are acting at this point," says Sen. @ChrisCoons on Nielsen's resignation.



It raises the question "for anyone who is offered a cabinet opportunity with President Trump whether their reputation will survive." https://t.co/fDKX7RtHY0 pic.twitter.com/zU383CCe1g — New Day (@NewDay) April 8, 2019

When Trump announced Nielsen's resignation Sunday, he appointed Kevin McAleenan as acting Department of Homeland Security secretary.

McAleenan joins acting White House chief of Staff Mick Mulvaney Mick MulvaneyMick Mulvaney to start hedge fund Fauci says positive White House task force reports don't always match what he hears on the ground Bottom line MORE, acting Ambassador to the United Nations Jonathan Cohen, acting Interior Secretary David Bernhardt and acting Defense Secretary Patrick Shanahan Patrick Michael ShanahanHouse Armed Services chairman expresses confidence in Esper amid aircraft carrier coronavirus crisis Boeing pleads for bailout under weight of coronavirus, 737 fallout Esper's chief of staff to depart at end of January MORE as major administration officials in acting roles.