Trump administration

Updated 4:55 p.m. ET

Nikki Haley is resigning as the U.S. ambassador to the United Nations and will leave the Trump administration at the end of the year, she said Tuesday.

It is not immediately clear what prompted the move. She informed her staff Tuesday, NPR's Michele Kelemen reports.

Haley appeared with President Trump on Tuesday morning at the Oval Office, where he called her a "fantastic person" and said Haley had told him six months ago that she might take time off at the end of the year.

WVXU/Pete Rightmire

The failure to repeal and replace the Affordable Care Act, revelations of an FBI investigation into ties between the Trump campaign and Russia, unfounded claims former President Obama wire-tapped Trump Tower and turmoil within the Republican party. 

The repercussions of the city of Cincinnati declaring itself a "sanctuary city" have spread like kudzu on a Georgia highway.

We've had Sean Spicer, the White House press secretary, standing at the lectern in the White House briefing room specifically singling out Cincinnati as one of those cities that could lose federal funding because of its policy toward immigrants, without distinction between those here legally or illegally.