MEET THE CABINET: Here's who Trump has appointed to senior leadership positions

While President Donald Trump still has hundreds of key positions to fill that will shape his next four years in office, his Cabinet is mostly full.

Trump has 24 official members of his Cabinet, and 111 days after he became president, the Senate confirmed all of them. But there have been some changes since then.

In the nearly nine months since Trump took office, multiple high-level hires withdrew from the confirmation process, and several senior advisers have resigned, including former chief of staff Reince Priebus and former Health and Human Services Secretary Tom Price.

Meet who is now counseling Trump for the next four years:

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Secretary of State: Rex Tillerson (confirmed)

Obama administration counterparts: Hillary Clinton, John Kerry

Duties: act as the top American diplomat, lead US foreign policy

Reactions: Tillerson has been praised for his business acumen and diplomatic missions negotiating deals for ExxonMobil, but roundly criticized for his close ties to Russian President Vladimir Putin, and Senators from both sides of the aisle have said he'll have difficult confirmation hearings because of their relationship. While Tillerson accepts humans are causing climate change and he supports the Paris agreement to limit emissions, environmentalists have taken issue with ExxonMobil's fierce lobbying promoting oil and gas.

Treasury Secretary: Steven Mnuchin (confirmed)

Obama administration counterparts: Timothy F. Geithner, Jack Lew

Duties: serve as the president's principal economic adviser, manage the public debt, set US tax and fiscal policy 

Reactions: As Business Insider's Matt Turner writes, there's a long list of reasons why people might not like Trump's pick for Treasury secretary. Sens. Elizabeth Warren and Bernie Sanders skewered Mnuchin's status as a hedge fund manager who worked at a large financial institution like Goldman Sachs — two things Trump called out on the campaign trail, as well.

Defense Secretary: Gen. James Mattis (confirmed)

Obama administration counterparts: Robert M. Gates, Leon Panetta, Chuck Hagel, Ashton Carter

Duties: lead the military, serve as "deputy commander-in-chief"

Reactions: Marines consider Mattis a warrior and he is well-respected by other service members. He has come under fire in the past for controversial admissions, however, like when he said in 2005 that it was "fun to shoot some people." Still, senators on both sides of the aisle have praised the pick, though they would have to waive a law requiring service members to wait seven years before becoming Defense Secretary to provide checks and balances. Sen. Kirsten Gillibrand of New York said she won't vote to waive the requirement, but Mattis likely has enough votes to clinch the nomination.

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