Well this should blow any arguments about Bernie Sanders' age out of the water. His 80 year old brother stood for election in May, increased his party's share of the vote and recruited new members.
Bernie's older brother Larry emigrated to Britain in the late 1960s. He trained as a social worker and then worked as a lecturer ending that career at Oxford University's department of social administration.
"I had been an active member of Labour in the 1980s, but it had become rather feeble. I noticed that in Oxford Labour councillors were voting with Conservatives, and the only person dissenting was a Green councillor.
"I stood unsuccessfully for them [the Green Party] a couple of times and was eventually elected to Oxfordshire County Council in 2005."
Discussing the Greens' limited success at general elections, Larry points to a "basic Conservative-Labour agreement on the fundamentals of the economy" which makes it "hard for a challenger to break through".
http://www.bbc.co.uk/...
Larry stood in the May general election for the Green Party in the Oxford West and Abingdon constituency. He spent less than the (low) maximum allowed under British law. Although he came in fifth, he recruited new members and the party has opened new branches (local party organizations are important in the UK).
He retains his American citizenship and will be returning to the USA to help out on his younger brother's campaign.