The polls may suggest Republicans will see gains in this November’s elections, but former Democratic strategist Bob Beckel thinks they shouldn’t get too comfortable. The Five co-host mysteriously signaled Democrats have something up their sleeve.

“I’ll tell you: I would expect an October surprise,” Beckel said on Thursday. “I think I know what is — I’m not going to say it, but I think I know what it is — and it is going to shake things up, and it has to do with national security.”

Beckel’s secrecy comes as President Obama faces perhaps the most significant foreign-policy challenge of his presidency, the growing threat of the Islamic State.