Cuban military and guerilla forces are no longer present in Central America, South America, or Africa. The Department of Defense has concluded that Cuba represents no security threat to the United States. Unilateral sanctions don't work. They don't change the behavior of the targeted country. When we stop our farmers and business people from exporting, they are hurt, and our Japanese, European, and Canadian competitors happily rush in to fill the gap.
Unilateral sanctions cripple our foreign policy.
They are an ineffective tool. The irony, and tragedy, is that the US embargo actually helps Castro. His economy is in shambles. The people's rights are repressed. These are the direct results of Castro's utterly misguided economic, political, and social policies.