I mean this was always the case, right? Just the headline is making people think the alliance is falling apart.
Article 5 only says all parties will take “…such actions as deemed necessary…to restore and maintain the security of the North Atlantic area.”
I think you’re missing a lot of the context here.
The collective agreement means that 3.5% of GDP will be spent on defense and 1.5% on defense related measures (cybersecurity, infrastructure security etc.). It applies to all countries in the alliance, including the US.
The US already spends around 3.5% on defense according to Reuters and there is no requirement to use US manufacturers over others.
I am not saying increasing defence spending is a good thing, just that you or the headlines have misinterpreted the agreement.
link to Reuters article.