It certainly should be in play, but just a mention among discussion overall foreign policy issues.
Just speaking strategically, if I were the GOP, I'd act is if I forgot it until an actual presidential debate, and then spring it on her, along with all of the unexplained issues that went along with it.
Because, it's a win-win. Even if everything she claims is true, that it was a Youtube video that she didn't know about (all things disproven in her own emails), it proves her incompetance and ability to assess situations.
Hilary is an easy target on a debate stage. And from what I can tell, Cruz would be best to pick her apart, as he seems to be the best debater out of all candidates, both parties. I'm not saying he's the best candidate, but he knows how to go for the jugular, and that's what the American people want.. flat-cold truth.