Final answer:
President Obama broke the trend of predominately White, male, Christian federal court appointments by nominating Justices Sonia Sotomayor and Elena Kagan, who are both women and bring more diversity to the Supreme Court.
Step-by-step explanation:
The president responsible for breaking the trend of White, male, predominately Christian federal court appointments is President Obama, who nominated Justices Sonia Sotomayor in 2009 and Elena Kagan in 2010 to the U.S. Supreme Court. Their appointments contributed to increasing the diversity of the federal judiciary. Before Obama, President George H.W. Bush nominated Clarence Thomas, an African American, to the Supreme Court in 1991, though his nomination process was acutely controversial. Appointing diverse candidates to the federal courts has been an ongoing concern, and the diversity we see today in terms of gender, religion, ethnicity, and ideology can be partly attributed to the actions taken by these presidents.