1/2 nl PS. Two limpers, unknown CO raises to $10. I reraise to $30 in SB with AA. He makes it $50. I started with $200, he has me covered. I put him on KK or AA but I'm not 100% sure. What do I do now and why?

He's got Kings. There's an extremely outside chance that he has queens but a vast majority of people would just call the re-raise with queens. Almost everybody I've ever seen who is willing to re-re-raise is going to have no problem getting all the money in the pot. You push because you have the best possible hand, and then you hope like hell for a paint-free board.

push. if he realizes at that point that you're on aces, then you've picked up $50someodd pot without even seeing the flop - that ain't too bad.
since he's reraised you're reraise, there's a solid chance he'll call off his stack with what looks very likely to be kings, maybe queens, and with and outside chance at the other aces.

If you have reason to believe (based on past hands) that he's not on KK (the most likely hand to call your all in), then there's nothing wrong with smooth calling the raise, and putting him on in any flop. the only downside to this is that if he has a hand like JJ that would not have called the all in, and the flop comes Jxx, whoops.

9 times out of 10, when i'm pushing here. I need to have a strong that he won't call it in order to smooth call his reraise.

I like all in now for two reasons... I don't want to second guess myself later (ie i'm not likely to laydown the overpair to almost any board) and he is likely to call it. I like AA all in preflop whenever I get the chance to push it that hard. I tend to move in on shortstacks that raise with some less than desirable hands KTs or 88, I hope this kind of play makes it easy for them to think I'm likely to be playing this way for much more money.

Prolly push at this level, at a higher level its more common to cold-call his re-raise. Because, he cann't pin you on aces and would be forced to lead out on a lower card flop, committing another good portion of his stack, making him have to call when you come over the top on the flop. Better players have the discipline to lay down kings in his spot if you re-raise again

I push every time. If he's any good, he has KK (or, unlikely, a split pot on AA), but I've seen people re-raise with JJ and worse, too.

Without a read giving you the ability to lay down AA, however, which I don't like to do, I think pushing is certainly the best move. That's actually a very sweet AA pot, and there's really no depth left to lay down. So, why give a free card to the set?