Fox News Catherine Herridge has another significant report on the ongoing story of Clinton’s private email server. For a year now, Clinton has staunchly maintained that nothing she sent or received was “marked” classified at the time. But Herridge reports that is not true. In at least one case an email sent to Clinton contains what is known as a “portion marking,” a way to note the classification of a specific item or paragraph within a document:

A 2012 email released by the State Department appears to challenge that claim because it carries a classified code known as a “portion marking” – and that marking was on the email when it was sent directly to Clinton’s account. The “C” – which means it was marked classified at the confidential level – is in the left-hand-margin and relates to an April 2012 phone call with Malawi’s first female president, Joyce Banda, who took power after the death of President Mutharika in 2012. Everything after that was fully redacted before it was publicly released by the State Department — a sign that the information was classified at the time and dealt with sensitive government deliberations.

To back up this claim, Herridge cites a 2014 classification training manual which reads in part, “Portion markings consist of the letters ‘(U)’ for Unclassified, ‘(C)’ for Confidential, ‘(S)’ for Secret, and ‘(TS)’ for Top Secret.” Here is a screenshot of the email in question which was sent from Huma Abedin to Secretary Clinton.

Herridge points out, “Everything after that was fully redacted before it was publicly released by the State Department — a sign that the information was classified at the time and dealt with sensitive government deliberations.” An unnamed source tells Fox News this is not the only email with similar portion markings.

Clinton has claimed dozens of times that nothing she sent or received was marked classified at the time. On Wednesday, she told Fox News’ Bret Baier, “The fact is that nothing I sent or received was marked classified and nothing has been demonstrated to contradict that.” If Herridge’s parsing of the email is accurate then something has been demonstrated to contradict that.