I changed my mind. I want Kennedy and the four liberals to slap down Trump while Thomas, Alito, and maybe Gorsuch write a cowering dissent. I don't know where Roberts will come down on this; he'll come down on wherever he thinks history will. Most likely, I can see Roberts going "hmm, history is going to judge us for this. OK then, better slap down the President."*
*Roberts has a precedent for behaving this way. It's the only reason he upheld the ACA. He doesn't want to be the Chief on the wrong side of history, a la Taney.
History is written by the winners. If Trump achieves is goals during his presidency history will judge him well, and will judge this action of his well. If he doesn't then it won't.
The sheer amount of 'Lost Cause of the South' stuff out there disproves that.