The Revolutionary Guards are a paramilitary and intelligence organization which helps arms and trains Shi'ite armed groups in the region.
US President Donald Trump designated the IRGC a terrorist organization in 2019 and ordered the assassination of its commander Qassem Soleimani in a drone strike in Baghdad the next year.
The European Union has so far held off on such a designation for the IRGC as a whole though it has designated individuals in the organization. None of the EU member states list it as a terrorist organization.
"To defeat the IRGC, which is responsible for sponsoring terrorist attacks against innocent civilians across the globe, the United States cannot act alone," congresswoman Claudia Tenney, a co-sponsor of the so-called Encouraging the EU to DESIGNATE Resolution, said in a statement.
"It's time for our EU allies to step up and follow suit .. this will send a strong message that the West is united against the IRGC's malicious actions and that we will hold them accountable for their vile acts of terrorism," the New York Republican added.
The EU has designated the Palestinian armed movement Hamas and the military wing of Lebanese Hezbollah terrorist organizations. Both groups, along with the Houthi group in Yemen and various militias in Iraq are backed by IRGC.