Donald Trump (R) - Kirstjen Nielsen (L)
© Reuters / Leah MillisFILE PHOTO. US President Donald Trump (R) looks on as DHS Secretary Kirstjen Nielsen (L).
US President Donald Trump is again preparing to shake up his administration, eyeing removal of the Homeland Security secretary and the Chief of Staff, US media reports, citing anonymous sources within the White House.

Homeland Security Secretary Kirstjen Nielsen might lose her job as soon as this week, according to the Wall Street Journal. Trump has cancelled a planned trip with Nielsen to visit troops at the US-Mexico border, telling his aides that he wanted her out as soon as possible, five former and current White House officials told the newspaper.

Nielsen has reportedly been disgruntled with her job, as Trump has berated her during Cabinet meetings and branded her a "Bushie" months ago, as she used to serve under President George W. Bush. However, she is supposedly reluctant to leave the post before reaching the one-year mark.

The DHS dodged requests for comment on the secretary's rumored departure, releasing only a vague statement.

"The Secretary is honored to lead the men and women of DHS and is committed to implementing the President's security-focused agenda to protect Americans from all threats and will continue to do so," the DHS said on Monday.

The rumors of Nielsen's imminent departure were reinforced by ABC's reporting on Tuesday.

"There's no love lost between either of them," an anonymous administration official told ABC about Nielsen-Trump relations. "All that has kept Nielsen on was not her loyalty to the president but desire to protect the department from his whims and to let her people do their jobs."

According to the same sources, which remain unnamed and therefore impossible to verify, Nielsen's departure is being delayed by her predecessor and the current White House chief of staff, John Kelly. Trump is said to have tried to fire Nielsen before, yet Kelly always stepped in, threatening to resign in order to protect his former aide.
Trump may have decided to deal with Kelly's resignation, however, according to the very same anonymous insiders. The president has reportedly already found a replacement for Kelly in Nick Ayers, Vice President Mike Pence's chief of staff. Some of the sources allegedly close to the president told ABC that picking Ayers instead of Kelly was a "done deal," yet others were less certain.

NBC for its part reported that Kelly had had an argument with Melania Trump earlier this year. It said the official had denied multiple requests from the First Lady to promote her aides, and that he'd interfered with their travel arrangements, not allowing them aboard Air Force One.

Media reports have also accused Kelly of repeatedly engaging in spats with other White House staffers, including National Security Advisor John Bolton. Last month, right outside the Oval Office, Kelly and Bolton reportedly had a heated, profanity-laden exchange over immigration policies. While the chief of staff defended Nielsen, Bolton accused her of failing to actually implement Trump's strict immigration policies. News outlets circulated rumors that Kelly or Bolton - or both - would resign or be fired over the incident, but nothing came of it.