No leverage over Castro regime?
Soviet economic aid to Cuba 1988:
$4,344,000 (That year, by the way, marked the peak of Castro's intervention in Africa. Such was the level of Soviets aid to Cuba that when the Russians said jump Castro said how high, to the tune of sending 50,000 of his soldier-slaves to Angola to get stomped by a South African and UNITA force a fraction their size.
Cash flow from the U.S. to Cuba in 2013, (made possible by a succession of Presidential orders since 2009:)
(cash remittances) $2.5 billion in 2012. Both categories (money and goods) together surpassed $5.105 billion.
In brief, the annual cash and merchandise flow from the U.S. to Cuba today exceeds annual Soviet subsides to Cuba at their peak. In brief, no U.S. President has ever held as threatening a testicular grip on the economic fortunes of the Castro regime as does this one. But instead of squeezing, he caresses.