[mattnxtc]

For a loose player, he does not have a big raising range which should be considered preflop. As others stated, just calling may be the worst of your 3 options. You could fold based off his tight raising range or 3bet to attempt to force the blinds out to build some overlay.

Postflop, I would tend to raise the flop over flat calling. His range is narrow and only a few of his holdings hit that flop. With his lower end showdown percentage raising the flop and betting the turn will cause him to fold a lot of his ace high cards.