Barack Obama is POTUS and Michelle Obama is FLOTUS, So What is Grandmom?

Marian Robinson is FGOTUS, the first grandmom of the United States.

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By Paul Bedard, Washington Whispers

He's called POTUS, as in president of the United States. She's FLOTUS, for first lady. So what's the acronym for President Obama's live-in mother-in-law, Michelle's mom? Marian Robinson is FGOTUS: first grandmom of the United States.