The hottest accessory of the summer (and possibly the year) arrived on Tuesday night with the first drop of merchandise for Kamala Harris and Tim Walz, just hours after the Vice President announced the Minnesota governor as her running mate. Amid understated T-shirts and mugs in shades of navy blue and white in the official online shop was a bold offering: a $40, union-made woodsman camouflage cap with the campaign’s logo emblazoned in bright orange.