Does Trump really believe that the Europeans are going to spend 5% of their GDP on defence?

Trump congratulated on having succeeded in convincing the Europeans to devote 5% of their GDP to defence. But that simply won't happen for the majority of European countries. Even the USA does not devote 5% of its GDP to defence.
Does Trump really believe that the Europeans are going to spend 5% of their GDP on defence?
Does Trump really believe that the Europeans are going to spend 5% of their GDP on defence?
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