https://arstechnica.com/tech-policy/2021/02/tech-groups-sue-maryland-to-block-new-digital-ad-tax-from-going-into-effect/

A group of business organizations led by the US Chamber of Commerce is suing the state of Maryland, seeking to block implementation of the state's brand-new, first-of-its-kind tax on digital-advertising revenue.

Maryland's tax bill is "deeply flawed" and "illegal in myriad ways," the suit (PDF) alleges, claiming that act will "harm Marylanders and small businesses and reduce the overall quality of Internet content."