Mester mentions the dollar
The take you often hear is that this is jawboning and often that's the case but she's a hawk and isn't saying that the dollar is a reason to keep rates lower.
What I think this shows is that the Fed is shifting (belatedly) to a more globalist view of the US economy. They've been wrong about inflation for so long because they don't realize that the US imports deflation and that the global surplus of labor puts downward pressure on wages.
So now they're looking at the dollar but soon they will be looking at the big picture.
See: Why wages matter far more than just the timing of the next Fed hike
