Secretary of State Marco Rubio warned Iran not to “test the will” of President Donald Trump during a White House briefing, stating that the administration would respond forcefully to further escalation while continuing to signal interest in de-escalating the conflict.
The warning follows repeated missile, drone, and maritime attacks by Iranian forces that have tested a fragile ceasefire between U.S. and Iranian troops. U.S. officials acknowledge multiple strikes on American positions and commercial shipping since early April.
War Secretary Pete Hegseth has maintained that the truce remains technically intact, noting the United States is “not looking for a fight” but will continue operations to defend shipping lanes and personnel.
The conflict centers on the Strait of Hormuz, a critical waterway through which roughly one-fifth of global oil flows. Iran has effectively constricted traffic through the strait since the war began, significantly slowing energy shipments and triggering global price spikes that impact American consumers at the pump.
Iran’s disruption strategy, which includes threats to vessels and the use of mines, drones, and fast boats, has reduced oil flows “to a trickle.” This has pushed the confrontation toward control of the waterway itself. The Trump administration launched ‘Project Freedom’—a U.S.-led naval effort—to reopen shipping lanes and escort vessels through the strait, aiming to break Iran’s de facto blockade and stabilize energy markets.
The operation coincides with hundreds of ships remaining stalled and sharp surges in global oil prices amid the disruption. This economic fallout has been felt domestically in the United States, as rising crude prices translate into higher gasoline costs despite most American oil being sourced elsewhere.
Iran now faces potential new international pressure, including sanctions tied to its interference with global shipping. U.S. officials argue that restricting transit through an international waterway risks broader economic retaliation.
The crisis traces back to late February strikes by U.S. and Israeli forces on Iranian targets, which triggered retaliatory attacks and set off a cycle of escalation centered on control of the Strait of Hormuz. A ceasefire reached weeks later was intended to restore normal shipping but has been repeatedly violated, keeping the waterway unstable.
Even as clashes continue, President Trump suggested that Iran may be seeking an “exit ramp” from the conflict, telling advisers that Tehran’s behavior indicates a desire to avoid prolonged war. This assessment has shaped the administration’s approach, combining military pressure in and around the strait with efforts to keep diplomatic channels open, while warning that continued attacks could collapse the ceasefire.
