The latest, Suhas Subramanyam's (Rep-D Virginia) Leesburg district office, was evacuated Monday, Oct. 19, and preliminary tests found the powder not hazardous.
Medium
White-powder envelopes have hit offices of more than three dozen members of Congress from both parties.
Count comes from the story's headline wording and is not explicitly attributed in the text; The Guardian and The Hill cover the incidents, but the SOURCES list notes outlets reported different incident counts, so the exact 'more than three dozen' figure is not firmly settled.
Medium
Preliminary tests found the powder at the Leesburg office not hazardous.
NBC reports preliminary tests negative with additional lab testing continuing, and Delaware reports confirmatory results pending; the story presents a preliminary result without the pending-confirmation caveat and does not attribute the test to a named agency.
Medium
More than 100 suspected white-powder letters are circulating in the mail.
Explicitly attributed to law enforcement sources cited by ABC; an estimate from anonymous officials via a single outlet not in the SOURCES list, and outlets report different counts.
Medium
Election offices in at least 15 states reported suspicious mail.
Unattributed in the story text; state-level incidents (Delaware, Louisiana, Oklahoma) are documented in Delaware state releases, The Guardian and NPR, but no listed source is shown confirming the 15-state tally.
Medium
No suspect has been named.
Unattributed negative claim; consistent with coverage across The Guardian, NPR and NBC, but stated as of publication without a named official confirming it.