AJ hand facing a raise

UTG has $70 to begin with and only has $20 left after his raise on the flop. Is this a fold or a go all in?

I have $200

He is loose preflop and moderately aggressive from what I seen.

Party Poker
No Limit Holdem Ring game
Blinds: $1/$2
6 players
Converter

Pre-flop: (6 players) Hero is CO with J:diamond: A:spade:
UTG calls, UTG+1 folds, Hero raises to $8, 2 folds, BB calls, UTG calls.

Flop: 6:heart: T:club: A:diamond: ($25, 3 players)
BB checks, UTG checks, Hero bets $20, BB folds, UTG raises to $40

GAMBOOOOL

From you're read I'd have to agree.

Shortie has Ax a lot here, and hopefully not AT/A6. Shove.