President Donald Trump ‘s pledge to “Buy American” may be failing to live up to its billing, at least at the General Services Administration, which delivers more than $54 billion worth of products and services to federal agencies annually.

Contract attorneys and consultants who deal with the GSA say there’s little evidence of a new, intense wave of enforcement to prevent contractors from selling Chinese or other-non-compliant products to the government that would distinguish the current administration from previous ones....