For decades American policy in the Middle East has rested on securing energy flows, supporting Israel, containing Iran, and countering terrorism. Each of those pillars is now contested, and so is the premise that the region should command this much American attention at all.
The original strategic rationale was oil. The United States is now a major energy producer itself, which has changed but not eliminated the interest, because global oil prices are set globally and disruptions raise costs everywhere regardless of where the barrels originate.
American commitments in the region take several forms: a security relationship with Israel, basing agreements and arms sales with Gulf states, and an extended military presence. These commitments interact, and steps taken toward one partner are read as signals by the others.
The regional balance is shaped by rivalry between Iran and a loose grouping of Israel and Sunni Arab states, alongside longstanding unresolved questions about Palestinian statehood. Analysts disagree sharply about which of these is the central driver of instability.