(NEWSER)  – It appears we're one step away from seeing an outbreak of "yo mama" jokes in the GOP presidential race. "Wow, Jeb Bush, whose campaign is a total disaster, had to bring in mommy to take a slap at me," Donald Trump tweeted Saturday.

"Not nice!" Trump was responding to an interview the 90-year-old Barbara Bush gave to CNN on Friday in which she said she is "sick" of Trump. "He doesn't give many answers to how he would solve problems. He sort of makes faces and says insulting things," she said. "He's said terrible things about women, terrible things about the military."

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