As many of the supporting justices are still on the bench, I have little doubt that Amtrak would win big in court again if it came to that.
Are we talking about
National Railroad Passenger Corporation v. Boston & Maine Corp. in 1992? If so you might want to revist that assumption.
William Rehnquist
Byron White
Harry Blackmun
John P. Stevens
Sandra Day O'Connor
Antonin Scalia
David Souter
Anthony Kennedy
Clarence Thomas
Considering that Thomas dissented we're basically we're left with
one single justice from that opinion. That's not much of a buffer seeing how little the Roberts Court reveres stare decisis.
UP has already shown that they don't want to challenge Amtrak in court.
I see what you mean in that occasionally UP has backed down in the past. However, every time UP tells Amtrak to sit on the side and wait for a freight to pass or tells Amtrak they need to pony up millions for rail improvements is that not a challenge? And if Amtrak doesn't push back legally then why would UP take it to court if they already have what they want? For many years Amtrak was willing to sit on the siding and twiddle their thumbs and there was nothing for UP to gain from initiating a court battle themselves. It's true that Amtrak has received some new potential remedies that may or may not impact future operations. However, we're also in a major slump for freight traffic that has taken much of the pressure off. From what I understand UP can also receive some compensation from Amtrak for improved on-time performance that is usually ignored but can be appealing in times of low freight volume. The
real battle for Amtrak's future probably won't start until after freight traffic fully recovers and the mid-term elections have swept one of the most anti-government legislatures we've ever had into power. When those conditions are met we'll see who
really holds the power, and I sincerely doubt it will be Amtrak.