AT MOST POLITICAL events in America, the arrival of the candidate is a big deal. A crowd builds, underlings prepare, and eventually the chosen one sweeps in, shaking hands, waving and generally being the centre of attention. That was not what happened when Dan Osborn, an independent candidate for the Senate in Nebraska, arrived at his event in Omaha on October 22nd to discuss Social Security. Instead, he arrived early, then milled around at the back, looking like another member of the crowd. Yet Mr Osborn has ambitions to achieve one of the biggest upsets of this election: unseating a Republican incumbent, Deb Fischer, in what ought to be one of the safest seats in America.