I've not heard of most of them I should say.
Are they all 'household names' or at least known vaguely by name in the United States?
Other than the P and VP I know John Kerry, and vaguely recognise the names Chuck Hagel and Eric Holder, but that's it.
Do they hold any power whatsoever do influence policy without the President/Congress approval or are really just managerial and administrative posts with zero influence?
I thought I'd test the CE&P regulars (mostly U.S. based) on their knowledge of the rest. I've never heard of them. Have you?
How many do you know without highlighting?
Secretary of the Treasury: [Jack Lew]
Secretary of the Interior: [Sally Jewell]
Secretary of Agriculture: [Tom Vilsack]
Secretary of Commerce: [Penny Pritzker]
Secretary of Labour: [Thomas Perez]
Secretary of Health and Human Services: [Kathleen Sibelius]
Secretary of Housing and Urban Development: [Shaun Donovan]
Secretary of Transportation: [Anthony Foxx]
Secretary of Energy: [Ernest Moniz]
Secretary of Education: [Arne Duncan]
Secretary of Veterans Affairs: [Eric Shinseki]
Secretary of Homeland Security: [Rand Beers]
White House Chief of Staff: [Denis McDonough]
Director of the Office of Management and Budget: [Sylvia Matthews Burwell]
Ambassador of the Environmental Protection Agency: [Gina McCarthy]
Trade Representative: [Michael Froman]
Ambassador to the United Nations: [Samantha Power]
Chairperson of the Council of Economic Advisers: [Jason Furman]