Possible Clues:

• Exams for students potentially most interested in this puzzle's theme, in brief
• Exams for future JDs
• Exams for aspiring attorneys, in brief
• Barack, Michelle, Hillary and Bill took them, for short
• Exams for future atty.s
• Hurdles for future JDs
• Exams offered four times a year, for short
• Exams for some srs
• Exams with logical reasoning sections
• Exams for some future clerks: Abbr