be a candidate

See: compete
References in classic literature ?
The aldermen, who without any question were Yankees in disguise, hit upon this neat device: they passed a by-law imposing a fine of L400 upon any one who should refuse to be a candidate for sheriff, and a fine of L600 upon any person who, after being elected sheriff, refused to serve.
As subjects you will each be assigned to be a candidate. You will remain that candidate throughout the experiment.