Last night, Bob Weir and Mickey Hart flexed their political muscle, performing a benefit for Vermont Senator Pat Leahy at Washington, DC’s Renaissance Hotel. In addition to the Grateful Dead icons, the political fundraiser featured a number of San Francisco family members including New Riders of the Purple Sage and the Flying Other Brothers. Earlier in the evening, Weir made his first appearance with the New Riders in some time during ‘Mama Tried,’ ‘Big River’ and ‘Henry.’ Later, Weir and Hart performed with Flying Other Brothers for a good chunk of its set, including on such choice numbers as ‘Uncle John’s Band,’ ‘New Minglewood Blues,’ Bob Dylan’s ‘Maggie’s Farm,’ ‘Down the Road,’ ‘Cassidy’ and ‘Iko Iko.’ All the evening’s performers then emerged for final jams based around ‘Black Muddy River’ and ‘Goin Down the Road Feelin Bad,’ with Senator Leahy and his wife Marcelle Pomerleau Leahy supplying backup vocals at the end of the night.