Sad news from CNBC — the network reports that its own Mark Haines, a veteran journalist who was the founding anchor of CNBC’s Squawk Box and co-anchor of Squawk on the Street, died suddenly Tuesday evening in his home. Haines was 65. In a statement to employees, CNBC President Mark Hoffman praised Haines for his “searing wit, profound insight and piercing interview style,” calling him “a constant and trusted presence in business news for more than 20 years. From the dot-com bubble to the tragic events of 9/11 to the depths of the financial crisis,” Hoffman continued, “Mark was always the unflappable pro. Mark loved CNBC and we loved him back. He will be deeply missed.” You can see video of CNBC personalities remembering Haines at the net’s website.