Recently, she downplayed the seriousness of the Jan. 6 assault on the Capitol on one of those shows. “This is now the crime of the century?” she asked sarcastically. She has echoed pro-Kremlin attacks on the United States, accusing Americans of “arming the Nazis of Ukraine.” And she has compared Dr. Anthony S. Fauci and Hillary Clinton to some of Hitler’s most notorious henchmen.

Her latest project is a forthcoming documentary on voting machines called “Selection Code” that is being financed by Mike Lindell, the chief executive of My Pillow, who has helped spread some of the most outrageous myths about the 2020 presidential election.

From the outside, Ms. Logan’s path has been one of the most puzzling in the modern history of television news. Her reporting for “60 Minutes” and the “CBS Evening News” helped inform the nation’s understanding of the toll that a decade of military conflict was taking on American forces. CBS News executives envisioned her as a next-generation star in the mold of a Mike Wallace or Dan Rather.

But her transformation, into a star of far-right media, is one that former colleagues who worked closely with her said did not completely come out of nowhere.