Step 1 · 95% confidence

The US provides intelligence sharing and diplomatic cover for Israeli action against Iran but does not commit military forces or substantial financial resources

Direct statement of the position - diplomatic support and intelligence without 'blank checks'

Step 2 · 80% confidence

The gap between rhetorical support and material commitment creates a credibility problem - Israel may doubt US reliability and act more aggressively or unilaterally to compensate

Allies who doubt security guarantees historically overcompensate through independent action (France's force de frappe, Israel's Dimona program); Vance's half-commitment could accelerate this dynamic

Step 3 · 85% confidence

Vance's position is internally unstable - if Israel strikes Iran and faces retaliation, the political pressure to escalate US involvement would be enormous, making the 'selective support' framing difficult to maintain

Historical precedent suggests that limited commitment in active conflicts is difficult to sustain (Vietnam escalation, mission creep in Iraq); once the US provides intelligence for strikes, it shares responsibility for consequences

Step 4 · 70% confidence

The position uses premises (no-us-vital-interest, domestic-over-foreign) that anti-Israel commentators hold for different reasons, creating an awkward coalition that could either mainstream restraint thinking or fracture under pressure

Vance shares premises with Mearsheimer and Carlson but reaches a different conclusion (support Israel rhetorically vs. don't support Israel at all); this coalition is united by what it opposes (blank checks) rather than what it supports