Steve’s Barking;Would NATO be stronger without the US?

Let’s face, when it comes to Europe and the United States things aren’t going very well.
Every so often the President of the United States threatens to leave NATO.
Would that be a good thing for Europe? Wouldn’t they spend more of their own money? Would they thenbuy less hardware from the United States and spend more on themselves.
Would they then be on less of a guilt trip from the U.S.?
The big question is would Europe be a safer place or would a clash of NATO nations and Russia be more likely?