Chipleaders Clash 4-left. $12/180 FT

[Wish]

Easy call. UTG=CO 4 handed, and if anything he's going to be raising lighter than he normally would in the CO spot. With effective stacks of 14 BB villain is shoving any hand he's playing. The "tight" range you assign is not tight, it's preposterously nittish. He's likely open shoving any pair, most aces, many kings, any two broadway and decent suited connectors. Perhaps wider than that. Some villains will be bullying the table shoving top 70% or so (and you've already described him as aggressive), figuring that people more worried about moving up from 4th to 3rd than playing good, aggressive poker will be folding better hands to this raise (though I doubt in villain's wildest dreams he thinks he's going to get somebody holding AK to fold preflop).