 As the pressure on the U.S. leader grows, he also hosts the leaders of the other 31 NATO countries for a three-day summit in Washington. Let's bring in Bloomberg's EMEA News Director, Rosalind Matheson. Good morning, Rosalind. There were lots of questions from White House reporters yesterday about this visit, the Parkinson's specialist visits to the White House. How much is this adding to the pressure facing the president?