A Republican member of the House committee investigating the deadly attacks against Americans in Benghazi, Libya, in 2012 says Hillary Rodham Clinton's email server may help lawmakers answer key questions.

One question is why security at the U.S. diplomatic compound in Benghazi was inadequate.

Rep. Susan Brooks of Indiana says in the weekly Republican radio address that gaining access to Clinton's server is "the only way to truly know" that investigators have obtained all the State Department communications that belong to the public.

Clinton acknowledged this past week that as the nation's top diplomat, she relied on a personal email account rather than one operated by the government.

Republicans have called on Clinton to turn over the server for an independent review.

Clinton has said the server "will remain private."