The Corporate Transparency Act, which requires businesses to disclose ownership information, was blocked by a federal judge as beyond Congress’s authority.

The company argued that the law, citing potential Chinese threats to the nation’s security, violated its First Amendment rights and those of its 170 million...

In trying to find the line between false statements and misleading ones in the case of a Chicago politician, members of the Supreme Court posed...

The justices are expected to rule quickly in the case, which pits national security concerns about China against the First Amendment’s protection of free speech.

The court, which hears arguments on Friday in a challenge to a law banning the app, has issued varying rulings when those two interests clashed.

The briefs, filed a week before oral arguments, offered sharply differing accounts of China’s influence over the site and the role of the First Amendment.

The president-elect took no position on the app’s First Amendment challenge to the law, which sets a Jan. 19 deadline to sell or close the...

In an unsigned order, the justices dismissed the case against the tech giant as “improvidently granted,” meaning they had concluded that it had been a...

A foundational 1984 decision had required courts to defer to agencies’ reasonable interpretations of ambiguous statutes, underpinning regulations on health care, safety and the environment.

The foundational 1984 decision required courts to defer to agencies’ reasonable interpretations of ambiguous statutes, underpinning regulations on health care, safety and the environment.