"In 1986, after a trip to Burma (now Myanmar) in the Golden Triangle to interview drug kingpin Khun Sa regarding possible locations of U.S. POWs, Gritz returned from Burma with a videotaped interview of Khun Sa purporting to name several officials in the Reagan/Bush administration involved in narcotics trafficking in Southeast Asia. Among those named was Richard Armitage, who later served as Deputy Secretary of State during George W. Bush’s first term as president. Gritz believed that those same officials were involved in a cover-up of missing American POWs. Perot later confronted George Herbert Walker Bush with the conclusive damning evidence Gritz had uncovered. Bush did nothing. A frustrated Perot became adamantly determined to challenge President Bush in his 1992 re-election effort. Bush and deep state forces had other plans for the insurgent Perot."
https://www.lewrockwell.com/2019/07/charles-burris/a-nation-betrayed-the-backstory-of-why-ross-perots-1992-presidential-campaign-was-sabotaged/