It’s a little after 6.30am on a steamy Friday in South Miami. A road sweeper appears in the pre-dawn twilight and trundles noisily past a man fixing red, white and blue bunting to a hedge at the Casa Cuba restaurant.
Chris Christie is up early for his campaign event, as he has been on many mornings of his ambitious presidential run. Yet this one has a different feel. It’s essentially a raid on an enemy stronghold. This turf is held by Donald Trump and Ron DeSantis, the two prominent Floridians in the race for the Republican nomination. Christie is aware he has to make a good impression.