Among top Trump aides, it’s now an open question as to whether Secretary of Health and Human Services Alex Azar and Centers for Medicare and Medicaid Services Administrator Seema Verma can survive the scale of bickering that has appalled and horrified people internally, a White House official said.

White House aides have been discussing the practical aspects of potentially replacing one or both officials if that decision were to come, as well as concerns associated with another Senate confirmation, according to the White House aide.

Acting White House chief of staff Mick Mulvaney has called both Azar and Verma to the White House for a meeting on Thursday in an attempt to mediate the duo’s months-long personality and policy clashes. Already, Trump told Azar and Verma to knock it off and get along — to no avail, said two senior administration officials.