As President Barack Obama has intensified his push to appoint circuit judges to the bench, a new study finds that his administration has been one of the worst in recent history when it comes to filling the nation's federal district courts.

Because judicial vacancies have remained "uniquely high" throughout Obama's term, federal district court judges have rarely been more burdened by caseloads than they are now, the study from the Brennan Center for Justice at New York University School of Law concluded.