Senate Foreign Relations Committee Chairman Bob Corker, R-Tenn., said Nikki Haley’s resignation from her post as U.S. ambassador to the U.N. “didn’t surprise” him and was likely planned and not the result of a conflict with President Trump.

Haley said in an Oval Office announcement she wanted to take a break from public service and believed it was time for someone else to take the position. Prior to serving as ambassador to the U.N., Haley was South Carolina’s governor for six years.