Final answer:
The party makeup of the House Select Committee on Benghazi was primarily Republican-led, with the purpose to investigate the 2011 attacks in Libya and the hearings characterized by partisan interrogation, especially on the then-Secretary of State Hillary Clinton.
Step-by-step explanation:
The party makeup of the House Select Committee on Benghazi was largely dominated by Republicans. This committee was responsible for the investigation into the attacks on the U.S. Consulate in Benghazi, Libya. During this time, Secretary of State Hillary Clinton was brought before the committee to testify. The hearings were perceived to be politically motivated, especially given that Clinton was considered a front-runner for the Democratic presidential nomination at the time.
The Republicans used the committee hearings to focus on Hillary Clinton, looking for political gains, while Democrats used their time to counter the Republicans' actions. While the precise numbers of Democrats and Republicans in the committee differed at various times, it was primarily seen as a Republican-led committee. The extended investigation and questioning of Secretary Clinton showcased the intense partisanship within the committee and the House itself.