From the article:
“As far as Howard’s death, I don’t know. He was healthy and fighting for his company when he made that trip to Washington DC, but he died there nevertheless.”
Yeah, but that’s all I can find. The actor Ron Howard was rumored to have died a few weeks after this guy, which waters down the search for any cause of death. Still, I could find nothing except that he was in DC for a meeting about this matter and then died unexpectedly. It fits the typical pattern of a Clinton/Obama-related death where everyone is afraid to pursue details.