Yet no one answered the question I posed: Name one instance where economic sanctions have worked.

FORBES: Where Aung San Suu Kyi, Myanmar's Nobel Prize Winner, Is Wrong

Economic sanctions, in one form or another, have been in place ever since.

NPR: Officially Sanctioned: A Guide to the U.S. Blacklist

"Trade sanctions are only one of the economic tools at our disposal, " the report said.

CENTERFORSECURITYPOLICY: Center For Security Policy

If President Obama were to turn his back on this important source of energy, it would be tantamount to him imposing economic sanctions on each and every one of us.

FORBES: Why Rail is a Dead End Alternative to Building the Keystone Pipeline

The African Union said earlier Tuesday that it would impose more sanctions on Mali, one day after the Economic Community of West African States slapped the junta with travel and economic restrictions.

CNN: STORY HIGHLIGHTS

The African Union said Tuesday it will impose more sanctions on the country, one day after the Economic Community of West African States slapped the ruling military junta with travel and economic restrictions after last month's coup.

CNN: African Union adds to sanctions in Mali

Governor Romney, in one of the interviews that he conducted yesterday, actually acknowledged something similar about the impact that economic sanctions were having on Iran.

WHITEHOUSE: Press Briefing by Deputy Press Secretary Josh Earnest