I’m a Cruz supporter (I like Trump and Carson as well), but this is just more sliming of Trump. Tenet did know that intelligence was saying Al Quida was planning an attack, so that means he knew. It doesn’t mean he knew when or how.
Trump gratuitously slime Bush. If there is any resentment or realization as to what type of man he is, it’s his fault.
Al qaeda is planning an attack.
That’s probably just as true today as it was in 2001. It’s about as meaningless a trope as I can imagine. It’s absolutely useless information.