Poland is moving closer than ever to a defining diplomatic breakthrough: a seat in the G20, the world’s most influential economic forum. Backed publicly by senior Washington officials, Warsaw’s ambition to formally join the club of leading global economies is now firmly on the international agenda.

The United States, which has just assumed the G20 presidency, has offered its most explicit endorsement to date. In a strongly-worded statement, US Secretary of State Marco Rubio declared that Poland will “join us to take its rightful place in the G20”, describing the country as one that has transformed itself from a nation “once trapped behind the Iron Curtain” into “one of the world’s 20 largest economies”.

Rubio emphasised that Poland’s economic ascent proves that “focusing on the future is better than holding on to grievances” and that its success showcases how transatlantic cooperation “can foster shared prosperity and growth”. His remarks place Poland’s prospective G20 role firmly within a broader vision of a revitalised Western economic alliance.

US Ambassador to Poland Tom Rose went a step further, declaring Poland “one of the wonders of this world” and a rising global power whose support is essential on NATO’s eastern flank. In his words, strengthening Poland isn’t a favour; it is a strategy embedded in Washington’s America First doctrine.

“Poland is a trillion-dollar economy, the strongest army in Europe, and the fastest-growing state in the region,” Rose wrote. President Donald Trump and Marco Rubio, he said, were the first to recognise Poland’s new status and intend to translate that into institutional recognition on the world stage.

§Their comments reflect a striking policy shift. For decades, the G20 has been seen as a closed structure, unlikely to expand. Yet Washington’s current message is unambiguous: the world’s economic order must reflect present realities, not those of the 1990s.

The US endorsement is not merely about economic metrics. It is also about geopolitics. As Europe contends with instability caused by Russia’s aggression, Poland has emerged as Washington’s most assertive and militarily capable partner on the continent.

The proposed changes would reshape the makeup of the G20. Rubio confirmed that South Africa would not be invited to the next summit, sharply criticising the country’s leadership for policies he characterised as economically destructive. The contrast was intentional, a signal that the US intends to reward markets and governments it sees as aligned with Western values and economic openness.

Warsaw has been lobbying for inclusion for years, arguing that its economic clout and geopolitical responsibilities justify full membership. Its GDP has already overtaken several older G20 economies on a purchasing power basis, and its industrial and defence sectors continue to expand rapidly.

Being invited as a guest to the Miami summit in 2026 expected to be confirmed soon, will provide a critical showcase.

Formal accession would require consensus among current G20 members, a diplomatic task still ahead for Poland. Yet, with the United States championing its case, the momentum has shifted undeniably.

The question is no longer whether Poland will join the G20, but when it will.

Photo: X/@intermarium24

Tomasz Modrzejewski