Very unlikely. The USA sugar policy is older than the corn policy, why would trade with Cuba change that just because it's one of their agricultural products?
Cuba is not even in the top ten cane producers, and more to the point, the USA alone produces over 15 times as much cane as Cuba. Brazil, which has bilateral free trade agreements with the USA, produces well over 400 times as much cane as Cuba.
What leads you to believe that lifting some sanctions against Cuba would do anything to change US sugar policy?
Cuba is not even in the top ten cane producers, and more to the point, the USA alone produces over 15 times as much cane as Cuba. Brazil, which has bilateral free trade agreements with the USA, produces well over 400 times as much cane as Cuba.
What leads you to believe that lifting some sanctions against Cuba would do anything to change US sugar policy?