Story highlights "He's not a serious adult," Sasse said in the adThe ad closes with the words: "Unfit. Washington (CNN) A new Hillary Clinton ad is turning to Republicans to make the case that Donald Trump is unfit for the Oval Office. The ad, titled "Agree," features clips of GOP leaders criticizing the business mogul in interviews and on news programs. "He's not a serious adult," Sasse says in an interview he gave on MSNBC. The ad closes with the words: "Unfit.

Source: CNN September 10, 2016 17:15 UTC