Article continues below advertisementDonald Trump is once again facing questions about his health after a strange moment happened during a White House event.On Wednesday, February 11, the 79-year-old president appeared to stumble over his words while delivering a speech celebrating himself as the "Undisputed Champion of Coal." What started as a routine line quickly turned into a confusing pause that caught people's attention.Article continues below advertisementSource: @HQNewsNow/XDonald Trump stumbled over his words during a White House speech.