Hustler NL tournament -- faces with button raise holding K9

[Scooterdoo]

Hustler Monday tournament. $125 buy-in with one rebuy. 1500 chips for each so 3000 in total. About 130 entrants and we are down around 30 -- pays top 18 or so. I have about 10k in chips with the blinds at 300/600 and 75 ante so there is close to 1500 in pot each hand before betting. I'm about 3rd in chips at my table, but probably around average for all participants.

Folded to button (which is pretty rare at this table). Button makes it 2000. I'm in BB and have K9o. The button is good LAG player. He has shown the ability to fold a hand. Another consideration... a few orbits before there were 4 limpers and I pushed with A6, he agonized and folded, but there was one caller who had 55 and I won the race. He clearly wasn't happy with his fold that time.

So what do you do in my shoes? Do you fold? Call and see what happens, call and do a stop and go? Push. Please let me know what and why? Results to follow.