MIAMI BEACH, Jan. 25 — Howard Dean was all smiles at a Women for Dean rally on Sunday in Hooksett, N.H., as he stood in front of a crowded room with Judith Steinberg Dean, his politically reluctant spouse who has made few campaign appearances. The couple exchanged loving glances as she read her introduction of him from a laptop computer. But after the event, Dr. Dean's tone changed, as he said discreetly but audibly: "Get her out. Get her out. Get her out." It could be that Dr. Dean was trying to shield his wife from the crush of supporters....