Nikki Haley's congratulatory tweet to Mike Pompeo is secretly shady

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Secretary of State Rex Tillerson was pushed out of the White House on Tuesday, with President Trump tapping CIA Director Mike Pompeo to succeed him. Trump's firing of Tillerson was reportedly rather unceremonious, as the president apparently never called Tillerson himself and the State Department said that Tillerson was "unaware of the reason" for his own dismissal.

Tillerson had been publicly at odds with Trump for months — and was also reportedly never close with Nikki Haley, the U.S.'s ambassador to the U.N. To that end, Haley's tweet congratulating Pompeo on his pending promotion is telling:

It's not yet clear whether tweeting shade at former colleagues is also a "great decision."