You may recall that the campaign decided to contest Iowa when the Mike Henry Iowa memo was leaked and they scheduled the Bill & Hill Iowa tour. Clinton does not need to win Iowa to win the nomination, but as she says she is in it to win it.

While the decision to contest Iowa no doubt required revamping their campaign strategy, Clinton does things on her own schedule. It looks like she and Bill toured Iowa to line up support, spent the rest of the summer building an organization there, and now she is returning to fight for the state.

Her campaign's Iowa moves do not strike me as reactive, given that they announced what they would do months ago.