Sens. John McCain (R-Ariz.) and Joe Lieberman (I-Conn.) will propose new sanctions on Iran tomorrow, punishing the country for human rights violations.
The two senators will unveil the legislation at a noon press conference. No details yet on what the sanctions might entail.
Earlier today, the Treasury Department announced new sanctions targeting Iran's Revolutionary Guard.
Thursday is the 31st anniversary of the Islamic Revolution, and is expected to be marked in Iran with both pro-regime demonstrations and opposition protests. Tehran executed two opposition protesters late last month, accusing the men of being "enemies of God."