The Supreme Court handed President Donald Trump a significant win Monday by allowing him to remove the leaders of once-independent federal agencies at will, toppling a 1935 precedent in the process that could reorder the way the government functions.

The decision will likely affect multimember agencies such as NLRB and EEOC, where former Democratic officials were similarly dismissed last year, attorneys told HR Dive.

The Supreme Court has dealt a major blow to Trump’s revenge quests, as well as his attempt to control the Federal Reserve.