77 with position against a TAG.

[WillMagic]

This is a three-bet or fold preflop. Either he's so tight that you have to fold, or you reraise to isolate. If you had something like KQs, ATs, KJs, then fine, I don't mind the colodcall. But allowing a third player in with 77 is devastating to your preflop pot equity. So he's either tight enough that you have to fold, or he's not. There's no middle ground.

The raise on the flop is standard.

Will