Related Clues:

• A country's CEO, often
• Top 55 Down
• National leader, for short
• Chief executive: Abbr.
• Oval Office occupant, briefly
• C. in C.
• Hil's hopeful title
• Part of POTUS
• Informal DC title
• Big kahuna
• Bd. leader
• Bush, e.g.: Abbr.
• G.W.B., e.g.
• White House occupant: Abbr.
• Firm wheel: Abbr.