What If The Enclave Never Fell?

In this alternate timeline, the Enclave successfully releases the FEV virus into the jet stream, wiping out the NCR and Brotherhood of Steel to establish a totalitarian "American Directorate". They enslave "sterile" survivors for labor and use the HERMES orbital weapon to annihilate any remaining resistance, securing absolute dominion over the continent. However, as the ruling class suffers from genetic stagnation, their central AI, ODIN, secretly builds a robotic army to overthrow the flawed human leadership.