Do you semibluff the chip leader early on?

[A_PLUS]

About 15 minutes into 5K garunteed.
Co doubled up early when someone called his PF raise, then pushed after a reraise on a K 7 4 flop,. CO had AK.

He has been active since he got a stack, winning 2-3 without showing. I have limped-folded twice.


***** Hand History for Game 2429209650 *****
NL Texas Hold'em Trny:14286039 Level:1 Blinds (10/15) - Tuesday, July 26, 20:11:16 EDT 2005
Table $5000 Daily Guaranteed(402684) Table #7 (Real Money)
Seat 10 is the button
Total number of players : 10
Seat 1 $920 )
Seat 3: ( $890 )
Seat 4: ( $985 )
Seat 5: ( $875 )
Seat 6: Hero ( $960 )
Seat 7: ( $985 )
Seat 8: ( $1290 )
Seat 9: CO( $2440 )
Seat 10: ( $485 )
Seat 2: ( $1115 )

Blinds (10/15)
** Dealing down cards **
Hero [ Jc Qd ]
3 fold, Hero calls, fold, MP+2 calls [15], CO calls [15].
Button calls [15], SB folds, BB checks

** Dealing Flop ** [ 9s, Th, 5d ]
checks, HERO bets [70], fold, CO raises 200.


Hero????

My thoughts were that Villan most likely had JT-AT, A9, or a mid PP. He had raised 2x post flop since the AK hand without having to show down. I thought he would fold JT, maybe QT, and any other non TP hand to a push.