Maybe I'm stupid, but why didn't they leave the two clauses in and let the Democrats vote against it if they liked?
If it's some kind of arcane senate rule, how come the rules always favor Democrats, never Republicans? Couldn't the Republicans maybe learn to use the rules some day?
Exactly!! It would have been even better had the resolution gone down and the Dems voting against it identified.
"Maybe I'm stupid, but why didn't they leave the two clauses in and let the Democrats vote against it if they liked?"
You're not stupid; I had similar thoughts. I believe the point is that by having somebody object, that put the resolution into a new realm, where would take more time and energy to get it through.
In my mind, that does not excuse the Republicans from backing down once again.
Lugar is likely the reason, read here to understand why.