NATO (without U.S.): 235 billion; Russia: 66 billion; Beyond pure monetary figures, the remaining NATO countries also boast two nuclear capable nations - the UK and France. They also have 4 aircraft carriers in service (not including the two new Queen Elizabeth super carriers being built by the UK). Russia only has one Soviet-era carrier. read more
nope without the U.S NATO is pointless just like without the UK or France the EU is pointless. if we were to pull out of NATO we would have to work with Russia to secure a long peace deal. no NATO means no threat to threat to Russia. read more
So, back to your question, even if USA withdraws from NATO, then also Russia can't take over European countries. They can defend themselves. They all have GDP equal to the US. I think, NATO would not be affected without US anymore. It would have the same power as it has now. read more