With a whimper, not a bang
After the decades of positivity and science that the ISS has brought humanity, what is happening today is already a tragedy. It's not just a matter of Russian commitment fading either. The US has set a course for a future where in a few years from now the ISS will be de-orbited, or maybe sold to some commercial developer. The ISS is a dead space station orbiting.
What does the future of LEO space stations look like? A Chinese station is in orbit today, and the Chinese government will happily allow other nations to share in the experience from the sounds of it. Can't blame the Russians for eyeing moving their meager resources away from the condemned ISS to the Chinese station. ESA astronauts are also likely to visit this station before long.
So that's it, then? ISS is already fading away amidst squabbling and budgetary deadlines, and in a few years the ISS and the dream of a US-led future in space will be a distant memory.
At least NASA will have a couple of SLS rockets with as much practical use as the Soviet N1, I guess.