Amtrak already has the legal right of way on pretty much all lines it operates on, that’s not the issue. The issue is that the cargo companies abuse the shit outta loopholes letting them go ahead anyways by having cargo trains so long that they cannot go onto bypass tracks, forcing Amtrak trains to wait for the cargo train to fully pass before it can continue despite Amtrak having the legal right of way.
It’s basically the same thing that happens with 16 wheelers vs pedestrians. A pedestrian might have the legal right of way when the crosswalk signal is going, but that doesn’t matter because that 16 wheeler isn’t gonna stop in time to avoid hitting them when it’s going at 40MPH. Physics beats laws every time.