Sen. Orrin Hatch (R-Utah) will attend oral arguments tomorrow in Microsoft's Supreme Court case about international data warrants, a topic on which he has long been the legislative leader.

Why it matters: Microsoft argues that the Department of Justice should not be able to request data from the cloud without getting permission from the country where the server is located, lest the DOJ force a tech firm to break a foreign countries laws to abide by a U.S. request. Hatch makes the same argument and spearheaded a bipartisan fix. As Axios reported, although tech firms care about the Microsoft trial, they care even more about the Hatch legislation passing.