The reason why is because if they did China would retaliate and cut off cheap access to Chinese imports. That is the double edged sword of globalization the US and Europe are reckoning with today, in different ways

I'm not really on an anti-China rhetoric, they can be a valuable partner and I think we do have a positive relationship with them. BUT, they don't need to win all public government contracts by undercutting local companies. They'd be equally upset if we did the same.

I do agree that the global market is causing quite some trouble, although that could be avoided by most (all?) countries being nice to each other. Or even excellent to each other!

"China would retaliate and cut off cheap access to Chinese imports"

That still would come at a hefty price for china as that means no or way lower income for quite a lot of chinese companies and people.