1. Introduction; 2. The implications of mixed judicial selection on decision-making; 3. Mixed judicial selection: prevalence and variation; 4. The Chilean Constitutional Tribunal in political context; 5. The Colombian Constitutional Court in political context; 6. Determinants of legal invalidation by constitutional judges; 7. Determinants of legal invalidation by constitutional courts; 8. Weak judicial vetoes and contentious politics; 9. Conclusion: Judicial selection and decision-making.