Yes, that's all that Obama could do. The GOP controlled the Senate. I'm curious what would you have liked him to do that you think would accomplished anything? The problem here was RBG's refusal to retire while the Democrats still controlled the Senate when it was clear that was the correct action.
The epitome of the bring a pencil to a gun fight pathology. And they cry foul as Trump issues a gazillion of "executive orders." How about bring in the military to Kentucky? Lol. There are a million of other pressure points. Dem leadership has always been so pathetic. No wonder they keep losing.