Sen. John McCain’s Republican primary challenger Kelli Ward attacked him over his age Thursday, arguing that he is too old and “weak” to serve in the United States Senate.

When pressed by NBC’s Chuck Todd Thursday on if she’ll support McCain if she loses next week’s primary, she said that she probably would, but went on to predict her own victory instead. She said that McCain has “fallen down on the job” and gotten “weak” on the eve of his 80th birthday.