Last night at Summerfest, I saw what could be the quintessential American band, Wilco. Wilco’s musical mix of rock, folk, country and even punk at times can resonate with an almost magical quality. Both the slow, quiet songs and the loud rowdy songs had this quality last night. The tunes that stood out for me were “Monday,” “War On War” and “Misunderstood.” The band also played some excellent new songs last night (which I hope will be on their next CD).