The Grand Jury hearing the case of Michael Brown later today could hear evidence from his alleged shooter, policeman Darren Brown.
After hearing from eyewitnesses, the jury must decide if criminal charges should be brought against the officer, who is currently in hiding after Mr Brown's family called for his arrest.
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In a tweet on Saturday, the US president didn't give a reason for his absence but said he wished"everyone well and have a great evening".
Weather conditions remain wet and windy through the weekend.
Mr Banks has given Ukip leader Paul Nuttall an "ultimatum", saying if he is not made chairman he will stop supporting the party.