Core Viewpoint - Amazon is considering terminating its large-scale shipping contract with the United States Postal Service (USPS) by the end of 2026, potentially worsening USPS's already challenging financial situation [1][2] Group 1: Contract Termination and Financial Impact - Amazon is the largest customer of USPS, contributing over $6 billion in revenue in 2025, making it a significant source of profit for the agency [1] - Negotiations for renewing the service agreement have stalled, with USPS management favoring a reverse auction model for access to postal facilities [1] - This strategic shift has led to the suspension of negotiations and prompted Amazon to initiate contingency plans for rerouting billions of packages [1] Group 2: Amazon's Logistics Strategy - The potential termination highlights Amazon's strategy to build a vertically integrated logistics empire, focusing on internalizing most of its "last mile" delivery operations within the U.S. [2] - Historically, Amazon relied heavily on USPS and UPS for package transportation, with USPS being a core partner for long-distance shipping and two-day delivery services [2] - Rising transportation costs and logistics bottlenecks during peak seasons in the 2010s have accelerated Amazon's efforts to develop its logistics infrastructure, including new cargo planes and delivery vehicles [2]