Now that her testimony is over, Nielsen plans to travel overseas for much of January, according to former DHS employees briefed on her schedule, capped by a trip to the World Economic Forum in Davos that starts Jan. 22. Soon after Davos, Nielsen is expected to announce she is leaving the agency, according to several former and current DHS officials. (DHS press secretary Tyler Houlton said he had no comment on Nielsen’s schedule.)

Nielsen worked briefly as the chief of staff for John Kelly when the retired marine general was secretary of DHS, and then as an aide when Kelly became White House chief of staff. She was nominated to run DHS in October 2017, a controversial choice because of her lack of experience in running a big agency. Her tenure has been rocky. As the face of harsh anti-immigrant policies, Nielsen has been booed in restaurants and protested at work and home. Yet Trump seems to feel she isn’t doing enough to drive asylum seekers away from the US, and has been threatening to fire her since May.

Kelly was Nielsen’s staunchest supporter in the administration, staving off several attempts to fire her as Trump blamed her for not being able to convince Congress to fund a border wall with Mexico. Kelly’s long-anticipated departure, announced Dec. 8, is expected to mean Nielsen will leave soon afterward.

Her exit wouldn’t stop the new Democratic Congress from forcing her to testify (see James Comey, for example). The House Oversight Committee has subpoena authority and is already planning a series of probes into Trump agencies. The House Homeland Security committee also plans to question DHS officials, including Nielsen.

“Given the many oversight and legislative activities that will undoubtedly take place in the next Congress, Nielsen should be eager to testify before Congress next year on the administration’s homeland security policies,” Bennie Thompson, incoming chairman of the Homeland Security committee told Quartz. “She has only come before our committee once.”

Congress could call Nielsen to testify to investigate whether the agency has established a pattern of twisting the facts and hiding information, said Ur Jaddou, director of DHS Watch, an immigration-policy watchdog, and former chief counsel for the US Citizenship and Immigration Service.

House committees are also likely to investigate the family-separation policy; Nielsen herself appears to have signed a memo that approved of the policy that has led to thousands of children being separated from parents, some for months at a time. She also was behind a directive that banned the top US immigration experts from testifying this year.

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