Romney hasn't been in too many one-on-one interviews, and, for him it's probably a good thing. Bret is asking questions very decently and respectfully, but Romney is going on the defensive. He is very shifty, stutters and provides rambling answers that are supposed to satisfy the status quo.
The first video has commentary of what various media figures think of his interview and the other two videos contain his complete interview.
Mitt Romney Speaks to Bret Baier - Part 1
Mitt Romney Speaks to Bret Baier - Part 2