Article continues below advertisementDespite constant speculation about Donald Trump's physical and mental health, the president insisted he feels as good as new.In a Wednesday, February 4, interview with NBC's Tom Llamas, the reporter asked Trump, 79, "How do you feel now as you approach 80?""I feel great. I mean, physically and mentally, I feel like I did 50 years ago," raved the politician, whose birthday is in June. "It's crazy."Article continues below advertisementSource: @nbcnews/youtubeDonald Trump, 79, said he feels as good as he did '50 years ago.