In the context of checks and balances in the U.S. government, the arrow that represents Congress's ability to propose changes to the Constitution to affect federal judges' decisions would likely be labeled as "Legislative Power." This illustrates the legislative branch's authority to amend the Constitution, which can indirectly influence judicial interpretations and decisions.
If you're looking for a specific diagram or visual representation, typically, this arrow would point from Congress (the legislative branch) to the Constitution itself, signifying the process of constitutional amendments.