When a president distributes tens of thousands of dollars in cash to the aides who manage his words, guard his movements, and share his most guarded moments, the ancient question of loyalty and compensation resurfaces in modern legal form. The Trump administration's holiday gifts to four White House staffers — ranging from $20,000 to $45,000 — have collided with federal ethics rules that draw a firm line between personal generosity and government compensation. What the White House calls tradition, federal law may call something else entirely, and the distance between those two interpretations