U.S. Sen. Carl Levin is reacting negatively to the latest disclosure by WikiLeaks.
The whistleblower organization published thousands of secret cables between U.S embassies abroad and the state department earlier this week. The cables were never meant for public consumption.
They contained a number of brutally honest observations about foreign leaders and governments, as well as the thought process behind many U.S. foreign policy decisions.
"Frankly, I was disgusted," said Levin.
He fears the disclosure will have a chilling effect on advice received from overseas embassies.
"I think people have to be able to speak freely," Levin said. "Our diplomats have got to be able to express their opinions back to the State Department and to the president, in a way where they can... say things which may be important to their country and therefore should be readily expressed, but may also be embarrassing if the host country for instance knew about them."
Levin says he supports prosecuting those behind the leaks.
An arrest warrant has been issued for the founder of Wikileaks, and a U.S. Army private is in custody over the disclosure.