So you finally looked it up, and understand what an embargo is. Good for you. You are now less ignorant.
However you still cant grasp the concept that it answers your question. We now have created an embargo on Venezuela.
Its legal, too. Our President has said (I am paraphrasing) to the world We are imposing Sanctions on these rogue nations due to their crimes. We will enforce those sanctions.
It's legal, too. Our President has said (I am paraphrasing) to the world "We are imposing Sanctions on these rogue nations due to their crimes. We will enforce those sanctions."
I don't know what you mean by "legal." It's "legal" in the United States of America, but that's about it. Any other country in the world will say (I am paraphrasing): "That's nice. But your sanctions have nothing to do with us. We'll continue to trade with these 'rogue nations' as we see fit."
Did the U.S. embargo on Cuba stop any nation other than the U.S. from trading with Cuba? No. Even our largest trading partner (Canada) continued to do business with Cuba as usual.