Can Trump turn prosecution into an election asset?

Donald Trump has lived his whole life as though he is trying to prove the theory that all publicity is good publicity. His appearance in court on Tuesday as a criminal defendant will test that cliché to the limit.

This case has certainly put him back in the spotlight. His journey from Mar-a-Lago, his Florida home, to New York was carried live on several US TV stations. He has apparently been discussing with advisers how he should appear throughout the court process - smiling defiantly or looking sombre and serious?...