On Wednesday's broadcast of CNBC's "Squawk Box," Senate Intelligence Committee Chairman Sen. Mark Warner (D-VA) said he is concerned about foreign election interference in the form of cyberattacks, spreading conspiracy theories, setting up fake events to incite violence or hiring people to show up at rallies, and using AI-generated deepfakes and criticized tech companies for not following through on promises to take down deepfake ads before stating, "in some of these areas, we're going to need more than voluntary guidelines."