 Meanwhile, top Democratic leaders are publicly standing by Biden. Robert F. Kennedy Jr. says it's hard to tell what is a conspiracy theory and what isn't when it comes to 9-11. On Friday, the independent presidential candidate made several comments about the terrorist attack over social media. He wrote, I won't take sides on 9-11 or any of the other debates and said that if elected, he will open the files and usher in a new era of transparency about the incident.