Any nation can sanction the US. Doing so would hurt its economy rather than America's, but they are certainly capable of doing it. All nations have the right to regulate trade, which means that the US has the right to impose sanctions. The US can and should use sanctions to stop Iran from getting nuclear weapons.
I don't think that the USA should be allowed to sanction a country without those sanctions and actions being scrutinized by and international Court that acts as a judge so to speak. Letting one country like the US just impose sanctions without oversight and approval mean they can bully intimidate and use corrupt reasoning to destroy other nations.
The US is the most corrupt and immoral entity currently on show to the world. They need to be stopped or at least reigned in. If other countirs stopped using the US banking system then it would cripple them. But world governemts are too weak and fearful to really stand up and make the world a better place.
It appears that sanctions only come to those who don't want to Allow the US to take their natural resources, Those who want to move away from the US dollar (because it has been manipulated so often having drastic consequences on economies) and also those who genuinely believe in Democracy and elect a socialist government To kickstart social policies for the benefit of the majority population.
Although sanctions could be a usefull tool, They should be screened and scrutinized in international courts before they come into effect. They should be fair and just. Not used as a tool for bullying nations against their will!
They impose something on weaker countries just because they can. They kill people in other countries using unmanned drones. What if other countries did that to the us?What if whe we went outside a drone from another country was shooting at us. Do unto others as you would have them do to you. We have lost our moral compass.
Yes, the real question is... Why would the US want to impose economic sanctions on a country? For peace? Their arsenal of weapons is quite impressive and they can intimidate many countries..I think this is a more subtle cloak and dagger method intended to get around most peoples thought processes.