Republican presidential candidate Donald Trump mocked Jeb Bush Saturday for bringing in his mother to help his campaign.

"Wow, Jeb Bush, whose campaign is a total disaster, had to bring in mommy to take a slap at me," Trump tweeted. "Not nice!"

Barbara Bush, former first lady and mother to Jeb and his brother former President George W. Bush, had called out women who support Trump for president on Friday.

"I don't know how women can vote for someone who said what he said about Megyn Kelly," Bush said on CBS' "This Morning," referring to Trump's various attacks on the Fox News anchor. "Money doesn't buy everything. It's accomplishments and what you're doing and giving. It's incomprehensible to me."

Late last month, Bush released a campaign ad for her son in which she swiped at Trump. Trump responded by tweeting that Jeb "desperately needed mommy to help him."

Despite the back and forth between the two candidates, Trump continues to dominate while Bush's campaign lags behind. Trump placed in second in the Iowa caucuses, while Bush came in sixth. Trump leads in New Hampshire polling ahead of the state's primary Tuesday. Bush is currently sixth in the Washington Examiner's presidential power rankings, while Trump sits in third.

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