AK UTG

[Lyric]

5/10 NL. $2,000 stacks, 9 handed.

You raise UTG with A[img]/images/graemlins/club.gif[/img] K[img]/images/graemlins/club.gif[/img] to $35. One call by TAG in middle pos.

Flop:
A[img]/images/graemlins/spade.gif[/img] K[img]/images/graemlins/diamond.gif[/img] 8[img]/images/graemlins/heart.gif[/img]

You bet out 3/4 pot $60, TAG raises to $180, you re-raise to $580, he pushes all-in.

What do you do, why, and what are TAG's possible holdings.