Undoubtedly the cutoff of aid will make some allies feel singled out and punished.
If sanctions are imposed, penalties could include the cutoff of U.S. assistance and certain export restrictions.
Israel, for example, has opposed the cutoff of aid.
And Latvian resistance to Russian ownership of Ventspils seems to be behind the cutoff of oil to the port.
The study said: "The cutoff of 15 days was chosen to mirror the diagnostic criteria for insomnia".
But an emphasis on human rights by President Jimmy Carter's administration led to the cutoff of military aid in 1977.
Some have blamed Russia and Gazprom for the cutoff of natural gas supplies to Ukraine and other parts of Europe earlier this year.
Mr. Boucher said talks with Colombian officials were continuing and the cutoff of the $130 million would not take place until Oct. 1.
The Kurdish official said that the cutoff of diesel fuel has cost the Kurdish party a large chunk of its annual $150 million budget.
As thousands of Palestinians rallied after Friday Prayer to protest Israeli shelling and the cutoff of international aid, the new Hamas leadership was no less adamant.
Yukos had to struggle to win acceptance in Lithuania, and Latvians are similarly distrustful of Transneft, with many seeing the cutoff of oil to Ventspils as politically motivated.
