Ralph Nader is loyal to one pen: the Papermate Flair. But Nader claims that the pens are drying out quicker then they used to. He reached out to Wirecutter (a NYT property) and they investigated. Archive.is link: https://archive.is/54jtw

"For years I've been using felt pens, mostly red and black but sometimes purple, to mark up The New York Times," Nader told me in a phone interview last year. "I go through every page of the Times, and I mark up different articles and send them to different people. And I do that with The Washington Post and The Wall Street Journal." (I am aware that once I click "Post" I cede control of this article, but if this could become a fun conversation about pens and not the umpteenth rehash of past presidential campaigns, I'd love it.)