Donald Trump on Friday chided former Florida Gov. Jeb Bush for his campaign’s new ad featuring his mother, former First Lady Barbara Bush.

Just watched Jeb’s ad where he desperately needed mommy to help him. Jeb — mom can’t help you with ISIS, the Chinese or with Putin. — Donald J. Trump (@realDonaldTrump) January 23, 2016

The Bush campaign on Friday released an online video ad, in which Barbara Bush describes Jeb Bush as a “hard worker” with a big heart.

“Of all the people running, he seems to be the one who could solve the problems. I think he’ll be a great president,” she says in the ad.

The campaign also released a hand-written letter from Barbara Bush, according to the Washington Post. In the letter she says that even though she originally didn’t want Jeb Bush to run for president, she changed her mind because “it became clear that he is needed.”

Watch the ad: