I like the way you played it before the river. Don't think preflop is too small when in position, it depends on your overall strategy for 3betting, depends on how wide he's opening / defending vs 3b, etc. There could be arguments for 3betting bigger depending on some variables, but that is fine.

What I dislike very much is the river snap-call. You really want to take time to think about your decision in this spot. Obviously this is the main event, and you're making a deep run, so every decision, even simple or straightforward at first glance, should be examined in more details.

In this pot, it's quite possible for you to have all AK and AA combos. You could have KK once in a while, but you might not CB flop, especially with this sizing. Anyway, I'd imagine many players wouldn't discount AK from your range too much. Your 3betting range might contains some other Ax as well (would u 3b AQ? Some Axs sometimes?). Anyway my point is that you're definitely not always foldng this river when Politano bets. That should make him wary of over-bluffing.

From his perspective, obviously it comes down to how loose his preflop range is in the first place. But I'd assume he doesn't have so many floats on the flop, nor hands he'd want to turn into bluff later. Let's say he open/call 88 or TT pre and X/C the flop, I'd expect him to usually try to go to showdown. He does have some 9x in his range, although probably not more than 5-6 combos (including 99). He could have some flushes, but with you having the Ks, it can't be more than 4-5 combos. As for his Ax (he should have a bunch of AJ/AQ type hands), I'm unsure why he'd choose to lead with those when he can usually check and decide. I think it's hopefull to expect him to bet AQ on this river, at least with this sizing.

So the situation kinda sucks: vilain can't bluff so often, he probably doesn't value bet weaker than AK very often, your perceived range contains a lot of Ax + it's not capped. So I'd take time to consider the river, it seems pretty important to try and get some tells or live reads of any kind. I'm not saying we should fold, but we could, especially deep in the main event. For me the mistake is only to snap-call, because although we have a strong hand, the situation dictates we think thoroughly about it.

I think the way the hand played it out is reasonably standard, Bruno call oop with 97s is very loose but in a tournament that blinds are this slow, you can get away playing more marginal hands without hurting a lot your stack in terms of bbs. I like to make 615,000-630,000 pre, since for 575,000 he is folding a very little portion of his range to does not allow you to autoprofit on the 3b. 

The flop is very dry and if he has like 87ss, 76ss, T8ss, JTss he plays the same way. This line, xc-x-b is not that much used with his bluffs since the flush got there and your range advantage OTF is really big but OTT I am not sure, since his range contains more suited hands than yours and more 9x. I will take a deeper look into it. I think calling is fine OTR but I am with mrsneeze here, snap calling in a spot that he Bruno's range contains very little hands that block your calling range OTR is not prudent. If he leads in a card that is very good for your range OTR, he is probably never value betting worse than AK and of course is almost never bluffing, specially given that you have the NFD blocker. 

btw, congratz for the deep run!

Thanks Raphael, Def could have played a couple hands slower after dinner.  But I am by no means a tournament specialist.  thanks for the input as well mr. sneeze.