Mattis departure leaves Trump Cabinet increasingly thin

The early departure of Defense Secretary James MattisJames Norman MattisFormer Mattis staffer: Trump 'shooting himself in the foot' on foreign policy Former staffer hits back at Mattis's office over criticism of tell-all book Former speechwriter for General James Mattis: Has the national security state grappled with Donald Trump? MORE, which caught congressional leaders by surprise, adds to a growing number of Cabinet vacancies in the Trump administration as well as a confirmations backlog in the Senate.

President TrumpDonald John TrumpTrump faces high stakes in meeting with Erdoğan amid impeachment drama Democrats worry they don't have right candidate to beat Trump Trump threatening to fire Mulvaney: report MORE on Sunday announced he is removing Mattis, who resigned on Thursday, two months earlier than his scheduled departure at the end of February.

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Also due to depart at year’s end are Interior Secretary Ryan ZinkeRyan Keith ZinkeOvernight Energy: Senate eyes nixing 'forever chemicals' fix from defense bill | Former Obama EPA chief named CEO of green group | Senate reviews Interior, FERC nominees criticized on ethics Senate reviews Interior, FERC nominees criticized on ethics Overnight Energy: Perry to step down as Energy secretary | Future of big-game hunting council up in the air | Dems lose vote against EPA power plant rule MORE and U.S. Ambassador to the United Nations Nikki HaleyNimrata (Nikki) HaleyHaley seeks to quell talk she could replace Pence Steve Schmidt: 'Overwhelming chance that Trump will dump Pence' for Haley Nikki Haley: Trump 'truthful' in 'every instance that I dealt with him' MORE.

The Senate will have to hold hearings and vote to confirm their replacements, as well as vote on William Barr, whom Trump has appointed to succeed Jeff SessionsJefferson (Jeff) Beauregard SessionsMedill dean 'deeply troubled by the vicious bullying and badgering' of student journalists Trump has considered firing official who reported whistleblower complaint to Congress: report Northwestern student paper apologizes for coverage of 'traumatic' Jeff Sessions event MORE as attorney general, and Andrew Wheeler, the acting administrator of the Environmental Protection Agency, whom Trump says he plans to nominate to permanently hold the post.

The president says he will replace Haley with State Department spokeswoman Heather Nauert.

That means the Senate will be cluttered by five high-profile confirmation fights at the beginning of 2019.

A sixth confirmation battle could happen if Trump pushes out Homeland Security Secretary Kirstjen NielsenKirstjen Michele NielsenDivided Supreme Court leans toward allowing Trump to end DACA Five things to watch at Supreme Court's DACA hearings This week: House kicks off public phase of impeachment inquiry MORE, who has come under fire from the president.

Senate Republicans are calling on Trump to replace Mattis with a like-minded candidate, even though Mattis announced Thursday that he was stepping down from the top Pentagon post because of differences with the president over national security policy. 

“I’d like a Mattis clone. I think we all would,” Senate Homeland Security Committee Chairman Ron JohnsonRonald (Ron) Harold JohnsonLindsey Graham basks in the impeachment spotlight Sunday shows — New impeachment phase dominates Rand Paul says Trump has 'every right' to withhold Ukraine aid over corruption MORE (R-Wis.) told reporters earlier this week. 

“This is disconcerting to say the least. We lost McMaster, we lost Kelly, we’re losing Mattis,” he added. “These are people that first of all served their country with distinction and they bring a very needed perspective into the administration,” he added, referring to former national security adviser H.R. McMaster, who left the administration in April, and outgoing White House chief of staff John KellyJohn Francis KellyMORE.

Mattis said he would leave after Trump surprised lawmakers by announcing a decision to withdraw 2,000 U.S. troops from Syria.

Brett McGurk, the special envoy for the coalition to defeat the Islamic State in Iraq and Syria, also announced his resignation Friday. 

While lawmakers aren’t grieving over the departure of Zinke, who has come under an ethical cloud related to a controversial land deal involving his family in Montana, they are uneasy about the departures of Mattis and Kelly, who were highly respected by both sides on Capitol Hill.

CNN host Jake Tapper asked Senate Foreign Relations Committee Chairman Bob CorkerRobert (Bob) Phillips CorkerLindsey Graham basks in the impeachment spotlight The Hill's 12:30 Report — Presented by Nareit — White House cheers Republicans for storming impeachment hearing GOP senators frustrated with Romney jabs at Trump MORE (R-Tenn.) on Sunday about the departure of several key figures Corker once described as “those people who help separate our country from chaos."

“About three or four or five months ago I noticed a real change,” Corker said. “I think the president has felt, ‘Look, I’ve got this now.’ ” 

Corker said the president appears to be putting less value on experts such as Mattis and Kelly, citing the decision to pull out of Syria despite the advice of national security experts.

The Senate still had to act on 195 executive nominees as of a week ago, according to a tally by The Washington Post and the Partnership for Public Service.

In addition, there’s a growing backlog of judicial nominees.

There were 31 judicial nominees awaiting floor action last week, according to the Senate Judiciary Committee.

Senate leaders traditionally confirm a package of judges before wrapping up a Congress but Senate Democratic Leader Charles SchumerCharles (Chuck) Ellis SchumerDivided Supreme Court leans toward allowing Trump to end DACA Ilhan Omar blasts Pete King as an 'Islamophobe' after he announces retirement: 'Good riddance' Top Senate Dem: Officials timed immigration policy around 2020 election MORE (N.Y.) refused to do so this month under heavy pressure from liberal activists.

The Senate will be tied up for the first half of next year over what are likely to be controversial confirmation hearings and votes.

Republicans, however, will have some more room to confirm Trump’s nominees, as they picked up two seats and will control a 53-47 Senate majority in 2019.