Possible Clues:

• One undecided as to which party to support
• Elector not sure to be forgiven a lot, possibly including treason without cause
• To travel in fog is stupid for indecisive citizen
• One is going from one party to another -- got travel info somehow
• One moving from party to party?
• One whose political allegiance might easily change
• One doesn't know where to cross
• I should go to a party - not sure which