Bubble adjustment against a fishy leader.

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Ok. You are playing a Party SNG, 10 or 20 buy-in. Chip leader (~2500) is a real fish, seriously considering calling a big raise with any face card - J2, K4, whatever. He has called several big ones with exactly these cards.

Blinds are 25/50, about to be 50/100. You have T800 - T1000 and are the short stack (so relatively even stacks). Other players are typical/passive.

Are you more or less likely to push in this situation with big cards, given his willingness to call in a hand where you might dominate him or at worst be a coinflip? Does your range of pushing hands increase when he is the only likely caller?

NT