An american embargo on Mexico will effect Mexico in spades even if it can trade with others. I am not glorifying Castro, but we have hardly hurt Castro, the idea behind the embargo is to make it unbearable for Cubans and make them revolt against Castro - that did not happen in 50 years and so its about time to change the tactics. US is the giant that can infuse a boat load money via tourism, or capital or through access to new technology and services. US can influence Cuba more if its economy is coupled with America's. That how we tackled Communist Chinese, remember.