I always start with characters rather than with a plot, which many critics would say is very obvious from the lack of plot in my films - although I think they do have plots - but the plot is not of primary importance to me, the characters are.
Chris Christie has been saying for a long time he's not interested in running. The media is trying to create a story by sucking Chris Christie into race, just like they made a story by sucking Rick Perry into the race.