US President Donald Trump's administration is considering a proposal that could lead to potentially designating Iran's powerful Islamic Revolutionary Guard Corps (IRGC) as a terrorist organization, according to US officials familiar with the matter.The officials said several US government agencies have been consulted about such a proposal, which if implemented would add to measures the United States has already imposed on individuals and entities linked to the IRGC.The IRGC is by far Iran's most powerful security entity, which also has control over large stakes in Iran's economy and huge influence in its political system.Reuters has not seen a copy of the proposal, which could come in the form of an executive order directing the State Department to consider designating the IRGC as a terrorist group. It is unclear whether Trump would sign such an order.