In September 2018, The Atlantic reported that Scott Greer, formerly a deputy editor and contributor at The Daily Caller, had written pieces under a pseudonym "Michael McGregor" in the white supremacist publication Radix Journal from 2014 to 2015. In articles for Radix Journal, Greer expressed white nationalist views, as well as racist anti-black and antisemitic views. While in his emails and messages, he expressed anti-Christian and antisemitic theories, as well his relationship with Richard Spencer. After being confronted with his past white supremacist writings, Greer resigned from any affiliation with The Daily Caller. In 2017 it was revealed that Scott Greer had ties to members of the white nationalist movement, including friendships with Devin Saucier, assistant to Jared Taylor of American Renaissance, and anti-immigrant activist Marcus Epstein of VDare, who had pled guilty to assaulting an African American woman two years prior to the beginning of his relationship with Scott Greer. Greer had later deleted parts of his Facebook page, but is seen photographed with white nationalists such as Spencer, Tim Dionisopoulos, the Wolves of Vinland, and also appears wearing clothes belonging to the group Youth for Western Civilization.
The Daily Caller has posted articles by Jason Kessler, a white supremacist who organized a rally of hundreds of white nationalists in Charlottesville. Before Kessler posted his article, he had spoken at white supremacist gatherings. After Kessler received attention for his organizing of the Charlottesville white supremacist rally, The Daily Caller removed his articles from its website, but The Daily Caller executive editor defended Kessler's articles.
The website has also published pieces by Peter Brimelow, founder of the white supremacist website VDARE. The website has also published articles by David Hilton, an anti-Semite who has pushed conspiracy theories that Israel was behind the 9/11 attacks. In his articles for The Daily Caller, Hilton promoted anti-Semitic conspiracy theories about George Soros, as well as conspiracy theories about "Cultural Marxism."