If Cuba looks increasingly vulnerable today, part of the reason lies not only inside the island but also in the weakening position of the regimes that traditionally helped sustain it. For decades Havana survived by leaning on external patrons. During the Cold War it was the Soviet Union. After the Soviet collapse it shifted toward Venezuela’s oil subsidies. Now the geopolitical safety net is thinner, and the remaining allies—Russia and Iran—are themselves under heavy strain.
The Venezuelan collapse was the first domino. For years Caracas supplied Cuba with subsidized oil that kept the island’s electricity system running and allowed the Cuban state to maintain social stability despite chronic economic inefficiency. Once the Venezuelan regime fell and those shipments stopped, the Cuban system immediately entered an energy crisis. The island suddenly faced blackouts, fuel shortages, and disruptions to transportation and food distribution. That loss alone exposed how dependent Cuba had become on external lifelines.
Normally the next fallback partner would have been Russia. Moscow has tried to position itself as Cuba’s geopolitical backer and has pledged investments and energy cooperation. But Russia today is operating from a position of relative weakness. Its economy is strained by years of sanctions and war spending, forcing the government to consider budget cuts and prioritize military expenses over foreign commitments. At the same time, Moscow’s inability to protect allied regimes—most dramatically visible in the Venezuelan episode—has raised doubts about how much real security it can provide to partners in distant regions. Russia can offer diplomatic backing and symbolic investment, but its capacity to sustain another country’s economy the way the Soviet Union once did is far more limited.
Iran is in a similar position. Tehran has long maintained ideological and security ties with anti-U.S. governments in Latin America, including Cuba and Venezuela. But Iran itself is under enormous pressure. Years of sanctions, economic stagnation, and recent military confrontation have weakened its ability to project influence abroad. Even when Iran supports allies, it usually does so through asymmetric networks and limited financial channels rather than large-scale economic subsidies. That model cannot stabilize an entire national economy like Cuba’s. Iran can provide political solidarity and some covert cooperation, but it lacks the financial capacity to replace the billions in lost Venezuelan oil support.
This combination matters because Cuba historically survived not through internal economic strength but through external sponsorship. When one patron collapsed, another stepped in. Today that pattern is breaking down. Venezuela has already fallen out of the equation. Russia is preoccupied with its own strategic and economic challenges. Iran is constrained by sanctions and regional conflict. The network of authoritarian solidarity that once buffered Havana is now composed mostly of states struggling with their own crises.
At the same time, Washington under Donald Trump has revived a more aggressive Western Hemisphere strategy. The removal of the Venezuelan leadership sent a powerful signal that the United States is willing to act decisively in the region again. For Havana, that development is particularly ominous because it combines internal weakness with external isolation. When protests and economic collapse occur in a system that no longer has strong external patrons, the margin for survival narrows dramatically.
That does not automatically mean the Cuban regime will fall soon. The Cuban state still retains a disciplined security apparatus and decades of experience managing crises. But the strategic environment around the island has clearly changed. Cuba is facing a moment where its traditional survival formula—leaning on powerful allies while repressing internal dissent—no longer works as reliably as it once did.
For the first time in many years, Havana is confronting the possibility that its friends are almost as weak as it is. And historically, that is often when closed political systems become most vulnerable.