Hypothetical WSOP Satellite Question

[slickpoppa]

Let's pretend that you are playing in a Stars 650 WSOP satellite. There are 9 players left. 1-8 get seats + 1K, 9th gets 650. Blinds are 600-1,200. All the players at the table are somewahat reasonable. The stack sizes and positions are as follows:

SB (28,000)
BB (Hero) (20,000)
UTG (20,000)
UTG1 (50,000)
UTG2 (40,000)
MP1 (12,000)
MP2 (30,000)
CO (35,000)
BUT (30,000)

Action: It is folded to MP1 who goes all-in for 12,000, folded to Hero who has KK. Hero?

If you answer fold, what would be the maximum stack size of MP1 that you would call against? If you answer call, would your answer change if you had 25,000 to begin with instead of 20,000?