Mark Knoller , the longtime CBS News radio correspondent and veteran political journalist, has died in Washington, D.C. He was 73.

CBS News confirmed his death on Saturday, noting he had been in ill health and suffered from diabetes.

Knoller was an editor and radio reporter for CBS News from 1988 to 2020. He was a legend among White House journalists for his status as an unofficial presidential statistician.

“His frustration over the lack of a central database of daily presidential actions inspired him to take upon himself the enormous burden of keeping meticulous records of every presidential act, movement, and utterance, single-handedly filling an immense void in American history,” CBS News’ Chip Reid wrote in his obituary for Knoller.

“Mark Knoller was the hardest-working and m

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