Social engineering attacks happen in politics as well as information security. This attack should have been prevented. There should have been a system in place to check credentials before being allowed into the building. This is a common practice at most buildings in Manhattan. One needs to be on a list at the front desk and sign in before being allowed to go to the office level.
According to CNN:
The two men were “each dressed in blue denim pants, a blue work shirt, a light green fluorescent vest, a tool belt and a construction-style hard hat when they entered the Hale Boggs Federal Building,” the release noted.
After they entered the building, the two men told a staffer in Landrieu’s office they were telephone repairmen, according to the release and Rayes’ affidavit. They asked for — and were granted — access to the reception desk’s phone system.
When they asked for further access:
A GSA employee then asked for their credentials, and the two men said they left them in their vehicle, the affidavit said.