It’s a big debate in European countries. It’s not just Trump - NATO’s Secretary Generals have been saying it. Currently that’s Jens Stoltenberg, former Norwegian PM. (I’m Norwegian, FTR.) I haven’t been paying that much attention to other countries’ specific debates, but I’ll lay out ours.
Norway defends its’ military expenditure of about 1,5% in several ways. As someone upthread pointed out, per capita we’re the 6th biggest military spender in the world. (Saudi Arabia, Singapore, Israel, USA, Kuwait, Norway.)
We also feed a lot of money back into the US and German systems - NATOs de facto backbone - by buying a lot of modern equipment off US and German retailers. Our artillery is German M109s (M109A3GNM), our tanks are Leopard 2s, our APCs are M113s, a lot of our helos are NH90s or Bell 412s. Not to mention that virtually all of our infantry weapon systems are American.
We’ve ordered 52 F35s, which we estimate to cost $769 million over their lifetime. Each. That program’s a known pork-barrel project for an inferior product, feeding money to the US “to keep us in with the Americans”, which is why both left-wing and right-wing governments have resisted the huge pressure to call off the planned purchases.
And still there’s a lot of us who say we should up it to 2% of GDP. If we won’t, who will? The only ones who’ve made a concerted effort the last three years are Lithuania and Latvia. (Both up from <1% to >1,5% in 3 years.)
The people in Norway who disagree usually bring up some admittedly good arguments.
[ul]
[li]What’s Russia going to do when 21 countries increase their military spending by 25 to 120%? In an alliance that traditionally exists to “Keep the Germans down, the Americans in and the Russians out”?[/li][li] Large armies will be used, if only to justify their existence. Which of the many military misadventures of the last 20 years can be used as examples to think that that’s in any way a good idea?[/li][li]We share a land border with Russia and literally haven’t had a war with Russia in milennia.[/li][li]Any actual NATO war with Russia will go nuclear in about 5 minutes. The US, UK and France have nuclear weapons, rendering the entire thing pointless. [/li][/ul]
I don’t buy into those arguments, but they are pervasive. I’m not saying these are great arguments for why the US should be shouldering far too much of NATO’s economical burden - I’m just saying that these are massive debates in each of the 21 countries, all of them bringing a lot of individual baggage into their discussion.
Germans are leery of militarization, Italian constitution imposes some degree of pacifism, the southern countries are still reeling from the Euro Crisis and massive unemployment, countries that border Turkey have shifted a lot of attention over to border security and immigration control and so on and so forth.
I think the US and NATO should keep up the pressure, over time, but not force the issue. That would not end well.