Why is Donald Trump so hostile to Nato?

President regularly slams alliance for slow progress on defence investment source: http://www.independent.co.uk/news/world/europe/trump-nato-summit-hostility-explained-defence-spending-germany-russia-a8441911.html #Headlines by: Joe Sommerlad

Original Post: https://www.independent.co.uk/news/world/europe/trump-nato-summit-hostility-explained-defence-spending-germany-russia-a8441911.html