Full briefing: Trump says 'I challenge anybody here to…', dares reporters

"I think we’re making America great again and it makes me feel good. It probably keeps me happy,” Trump told reporters accompanying him on a flight back to Washington from Florida. Trump was asked about the medical exam on Sunday and how he stays healthy, Trump said, “Because I enjoy what I’m doing and I like the results. Trump also spoke on a range of geopolitical issues. Watch the full briefing here.