... President Donald Trump is vowing to spark a manufacturing boom with tariffs to protect American workers and industry. So far, it's manufacturers that have borne the brunt of the pain. ...

Yup.

But not only have manufacturing jobs started to suffer recently, as noted in another part of the comment, the uncertainty is preventing US companies from planning to bring manufacturing back to the US.

So, Pres trump's whimsical approach to tariffs seems to be having the opposite effect upon manufacturing than the effect he promised.