Alleged death threats, internal party spats and candidates wearing stab-proof vests when canvassing is just some of what has taken place during campaigns.
Rochdale by-election candidates and their policies mancunianmatters.co.uk - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from mancunianmatters.co.uk Daily Mail and Mail on Sunday newspapers.
The Rochdale contest is the latest in a string of recent by-elections triggered by deaths, resignations and MPs being booted out of their constituencies for bad behaviour