The threat has arisen as Iran responds to Western sanctions designed to make it end a nuclear programme said to be aimed at producing an atomic bomb.
Buchanan opposed economic sanctions designed to punish South Africa for apartheid, as did many other 1980s Republicans.
The decision now is whether to keep talking, or start sanctions designed to weaken the country's ruling elite.
The US responded by expanding sanctions designed to cut off funds to the regime's elite.
The behaviour of members of society is also directly affected, as we saw earlier, by sanctions designed to ensure compliance to its standards, that is, by social control.
This would be the last tour to South Africa prior to the application of international sporting sanctions designed to oppose the policy of apartheid.
On Iraq, let's stop messing around with "smart sanctions" designed to let more goods into Iraq while weeding out military items.
To do this, Dr. Khan overcame American sanctions designed to prevent Pakistan from obtaining a nuclear bomb.
Tehran's latest tough rhetoric over the waterway is part of a feud with the US over new sanctions designed to discourage the Iranian state from developing nuclear weapons.
The committee will work to strengthen the economic sanctions designed to make Iran's rulers choose between nuclear weapons and a functioning economy.