Politicians should not be able to fill the courts with their political supporters and ideological fellow travelers, pro big business judges, and pro-government judges, as if the courts were their private property existing to serve their agendas. The only way to stop politicians from doing these things is to end the practice of politicians choosing judges.
Judicial selection juries are a far better and far more democratic way to choose judges than either popular election or appointment by politicians. This is how judges should be chosen, at both the state and federal level.
(1.) Chemerinsky, Erwin. 2015. The Case against the Supreme Court. New York: Penguin, page 6