US President Donald Trump has rolled back the former President Obama's administration business dealings with Cuba.

Speaking in Miami, Florida, President Trump said his new policy would tighten rules affecting travel and sending funds to the Caribbean island nation.

The new policy bans most US business transactions with the Armed Forces Business Enterprises Group of Cuba.

It also calls for tighter enforcement of a longstanding ban on American tourists going to Cuba.

President Trump also signed a presidential directive rolling back parts of Obama's opening to Cuba.

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