SLS is bad idea anyway.
Gene Kranz himself said in an interview that the large heavy lift rocket was the wrong approach. Its so expensive that they'll only every be able to afford one a year .
A better solution would have been a cheaper smaller rocker and assembling missions in orbit. That give you multiple launches, in space time for crew and experience at on orbit assembly. All stuff which is valuable skill and can be transferred to the inevitable change of program when a new administration comes in.