
The legislation is similar to a measure under consideration in the House of Representatives, making it more likely that some tightening of sanctions will pass in the current session of Congress ending in 2013.
The Senate version also targets the governments of North Korea and Syria with new sanctions.
Sponsors include Senator Susan Collins, a Republican co-sponsor of the bill, Democrats Robert Menendez and Bob Casey, Independent Joseph Lieberman and Republican Jon Kyl.
According to Reuters, Senator Collins said in a statement, “Congress should pass, and the administration should robustly enforce, strengthened sanctions against Iran to ensure that every effort is made to prevent Iran from threatening the United States and our allies in the region with nuclear weapons.”

