Missouri is one of about 9 states that privileges its bar in selection of state supreme court justices. Missouri's appellate nominating commissions has some seats selected by the state's lawyers. This bar-privileging system yields a judiciary with a disproportionate number of Democrats and few Republicans. State Rep. Nick Schroer, a lawyer, explains of the last "30 nominees stretching from 1995 to today — the Appellate Judicial Commission has nominated only three Republicans."
Stanford University Professor Adam Bonica, et al. on lawyers' liberal tilt.
Vanderbilt Law Professor Brian Fitzpatrick has analyzed the impact lawyers' liberalism has on judicial selection.
More on lawyers' progressive tilt.