At Chevron arguments at Supreme Court, Kagan’s questioning exposes the stakes

She summed up the issue as whether the countless policy issues confronting the nation will be decided by courts that don't have expertise or agencies that do... 

For context, it's important to understand that the Chevron decision came in 1984, when Republicans had executive power and wanted to wield it instead of judges. Now that Republicans have reshaped the high court — cementing a 6-3 conservative majority — they want the justices to hold that power…

https://www.msnbc.com/deadline-white-house/deadline-legal-blog/supreme-court-chevron-precedent-kagan-rcna134342