Homeland Security secretary expected to leave

President Donald Trump has soured on Homeland Security Secretary Kirstjen Nielsen and she is expected to leave her job, perhaps as soon as this week, according to two people with knowledge of the issue.

Trump has blamed Nielsen for not doing more to address what he has called a crisis at the US-Mexico border, the sources said. Curbing immigration is Trump's signature issue and one he returns to as a way to rally his most loyal supporters.

But anyone who takes over at Homeland Security is likely to run up against the same problems that Nielsen faced. The administration has already tried to clamp down at the border but those efforts have been largely thwarted or watered down due to legal challenges.

Nielsen had hoped to complete one year in the job and leave in December, but it appeared unlikely she would last that long, said two sources. Both people who had knowledge of the debate spoke to the AP on condition of anonymity because they were not authorized to speak publicly.

Trump was widely expected to shake up his Cabinet after the midterm elections and rumors are swirling about the status of a number of department heads. He also told allies that he never fully trusted Nielsen, whom he associated with President George W. Bush, a longtime foe.

And he told those close to him that he felt, at times, that her loyalty was more toward her longtime mentor, White House chief of staff John Kelly, than to the president. Kelly's status is also unclear, one of the people said.