If the high court sides with Starbucks, it could make it tougher for the agency to step in when it alleges corporate interference in unionization efforts.
A court battle amid an Army vehicle competition is highlighting the hurdles and struggles non-traditional companies face trying to break into the industry.
No president until Donald Trump had asserted that by reporting findings to Congress, inspectors general were making unconstitutional intrusions into presidential and executive branch prerogative.
A Justice Department watchdog report from December found errors and omissions in applications to monitor the communications of a former Trump campaign aide, and an audit released last week found problems with additional applications between 2014 and 2019.