The US is overhauling its strained relationship with Cuba. 'It's time for a new approach," Obama said.
The Florida Republican senator also says Congress won't support lifting the half-century embargo on Castro's Cuba.
Obama's moves toward Havana are raising the promise in South Florida that they will finally open up Cuba's economy.
The move to normalize relations with Cuba will strengthen the Castro "dictatorship," a former U.S. diplomat says.
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