  Wayne Dropulich, Sports Party candidate. Photo: Philip
Gostelow  Three Senate races are going down to the wire.
Canberra's sex industry spokesman Robbie Swan could pull off an
upset victory in Tasmania, while in WA, the Sports Party's Wayne
Dropulich is neck and neck with the Palmer United Party.  Labor
senator Louise Pratt could pull off a surprise in WA by
unseating the Greens' Scott Ludlam, whose seat is on a knife-
edge.  These contests are too close to call given the vast
number of preferences and ''choke points'' at which one of two
closely bunched candidates must drop out.  On election night, it
seemed that Jacquie Lambie of the Palmer United Party would take
the final seat in Tasmania and Senator Ludlum would edge out
Senator Pratt.  It seemed that Mr Dropulich would be the final
senator from WA, despite winning just 0.22 per cent of the vote.
But if you feed the numbers into ABC analyst Antony Green's
online Senate calculator, it shows Mr Swan - who once appeared
on TV in drag impersonating a pros