After Secretary of State Marco Rubio determined that Ambassador Ebrahim Rasool was no longer welcome in the U.S. and posted his decision Friday on social media, South African embassy staff were summoned to the State Department and given a formal diplomatic note explaining the decision,

Remarks by South Africa's ambassador to the United States about President Donald Trump were "unacceptable," a State Department spokesperson told reporters on Monday after Washington last week made the decision to expel the envoy.

Secretary of State Marco Rubio had lashed out on social media over comments critical of President Trump that the ambassador had made to a think tank in Johannesburg.