Funding sleeper agents is very easily done - they can start of running across the border with a backup full of heroin and feeding that into a distribution network that they control or partner with (less likely), setting them up working a legitimate jobs (hardest to detect), or having a sympathetic imam support them with charitable funds collected from a shia mosque.
None of those options are particularly difficult to pull off.
I can almost guarantee you that Iran isn't sending state funds via direct deposits/western union/crypto to agents in the United States.
None of those options are particularly difficult to pull off.
I can almost guarantee you that Iran isn't sending state funds via direct deposits/western union/crypto to agents in the United States.
