President Donald Trump is set to address the United Nations General Assembly this week, emphasizing a renewed push for international collaboration in confronting Iran. His administration simultaneously aims to reshape the global body, a strategy outlined by U.S. Ambassador to the U.N. Mike Waltz in an exclusive interview ahead of the high-level gathering.
The diplomatic offensive unfolds as Washington seeks to escalate economic pressure on Tehran, particularly as the conflict between the U.S. and Iran enters its seventh month. Concurrently, the administration faces scrutiny over its efforts to reduce the UN’s scale and expenditures, with critics questioning the potential impact on the organization’s capacity to respond to global crises.
Intensifying pressure on Iran and global compliance
Ambassador Waltz articulated Washington’s clear expectations from its international partners: full adherence to sanctions against Tehran. He warned that any nation failing to comply, regardless of its relationship with the U.S., would face consequences. This firm stance underscores the administration’s commitment to global security, aiming to prevent Iran from developing nuclear weapons.
The ongoing conflict, initiated by U.S. and Israeli strikes in February, has significantly disrupted energy markets. Iran has actively obstructed shipping through the vital Strait of Hormuz, while its Houthi allies have tightened their control over a critical Red Sea shipping lane. Despite these pressures, European and Asian allies have largely shown resistance to Trump’s requests for direct assistance in the conflict.
Waltz highlighted that enforcing these sanctions will be a central theme of the U.S. diplomatic agenda during the UN General Assembly. He pointed to Iran’s struggling economy, marked by currency depreciation, rampant inflation, and the impact of the U.S. naval blockade, as evidence of the sanctions’ effectiveness. This diplomatic push follows a recent setback in the UN Security Council, where Russia and China blocked a resolution to continue independent monitoring of international sanctions on Iran.
UN reform efforts and budget restructuring
The push for Iranian compliance coincides with a broader debate over the future of the United Nations, an institution President Trump has frequently criticized for perceived inefficiencies and anti-American biases. His administration has actively pursued substantial reforms, focusing on reducing the organization’s size and spending.
Ambassador Waltz defended the administration’s continued financial contributions to the UN, despite its criticisms. He cited recent efforts to streamline the budget and redirect the institution toward its foundational mission. The U.S. recently remitted $725 million toward the UN’s regular budget and an additional $102 million for peacekeeping operations, mitigating the immediate risk of losing its General Assembly voting rights in 2027, though a substantial debt of approximately $1.312 billion to the regular budget remains outstanding.
The reform initiatives championed by the administration have yielded significant results, including more than $1 billion in budget reductions. These cuts have impacted various aspects of the organization:
- Approximately 3,000 headquarters positions have been eliminated.
- Peacekeeping personnel have seen a reduction of around 25%.
Despite these extensive cuts, Waltz affirmed that the U.S. has no intention of abandoning the United Nations. He emphasized the necessity of a global forum where nations can convene for diplomacy and dialogue, stating that the world needs “one place where everyone can come together and put diplomacy first.” He cautioned against the implications of a U.S. withdrawal, suggesting it would leave 192 countries deliberating without American input.
Strategic shift in the Arctic with the Greenland agreement
In a parallel development, President Trump’s arrival in New York follows the announcement of a new security agreement with Denmark and Greenland. This pact aims to bolster the American military presence in the Arctic region while simultaneously preventing rival nations from establishing bases or making sensitive investments on the island.
Ambassador Waltz underscored the immense strategic importance of this agreement. He noted that the Arctic’s melting ice is opening new shipping routes and expanding access to critical energy and mineral resources, making the region a growing geopolitical hotspot. While the deal falls short of President Trump’s earlier aspiration to acquire Greenland, both Denmark and Greenland have affirmed that the arrangement will not compromise the island’s sovereignty or its right to self-determination. Further details of this agreement are yet to be publicly disclosed.
Broader diplomatic engagements and regional security
Beyond the immediate focus on Iran and UN reform, the U.S. delegation, led by Secretary of State Marco Rubio, will engage in a series of high-level meetings. Rubio is scheduled to meet with foreign counterparts from September 20-23 in New York to advance U.S. security and economic priorities. President Trump is also slated to meet with Gulf leaders to discuss the regional conflict and collective security concerns, viewing this as a crucial diplomatic opportunity to directly address their perspectives.
The administration’s approach to Gaza exemplifies its strategy of leveraging the UN for international burden-sharing in security operations, minimizing direct American military involvement. Waltz referenced the UN-endorsed Board of Peace and the International Stabilization Force, authorized in November 2025 by the UN Security Council, intended to support security and post-conflict transition in Gaza. He reiterated the desire for other nations to contribute troops, avoiding American deployment in the region.
