WASHINGTON (AP) — The first prosecution arising from the Benghazi attacks is playing out in the federal courthouse blocks from both the White House and Capitol Hill, an appropriate setting for a case that has drawn stark lines between President Barack Obama and Republicans in Congress.

The criminal proceedings could provide new insights into the 2012 attacks that killed four Americans and will serve as the latest test of the U.S. legal system’s ability to handle terrorism suspects captured overseas. Unfolding during an election year, the case against alleged mastermind Ahmed Abu Khattala could also help shape the legacies of Obama and Attorney General Eric Holder, and spill over into the potential 2016 presidential candidacy of Hillary Rodham Clinton.