Pocket guide: What you need to know about Scott Walker

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After spending most of the last year in campaign mode, Wisconsin Gov. Scott Walker is ready to make it official: his presidential announcement is planned for Monday.

You may know Walker for his union-busting in his home state—or you might not know know him at all. If that's the case, we got you. Here's Fusion's pocket guide to where Walker stands on 7 key issues: