CSIS Global Security Forum Scheduled for June 30 as U.S. Alliance Pressures Mount

What's Scheduled

The Center for Strategic and International Studies is hosting its 2026 Global Security Forum on June 30, running 8:00 a.m. to 5:00 p.m. EDT. The forum's stated theme: "What Must America Defend? The Future of American Statecraft."

The question reflects a genuine strategic debate that has been building across both parties for years and has accelerated since 2025.

The Context CSIS Is Walking Into

The forum arrives at a moment when U.S. alliance architecture is under more scrutiny than at any point since the Cold War ended.

On NATO's eastern flank, European members have spent two-plus years absorbing the cost and logistics of supporting Ukraine while simultaneously being pressured to hit the 2% GDP defense spending threshold, a target most still miss. On the Indo-Pacific side, the U.S. is trying to hold together a web of bilateral and multilateral commitments — Japan, South Korea, the Philippines, Australia — against a Chinese military that has expanded its naval capacity faster than American shipyards have been able to respond.

Meanwhile, USMCA, the trade framework binding the U.S., Canada, and Mexico, is under its own pressure. CSIS has a separate event on North American agriculture under USMCA scheduled for June 24, the day before a forum on AI infrastructure and data centers. The sequencing matters: economic security and hard security are no longer separate conversations.

What CSIS Is and Isn't

CSIS describes itself as a bipartisan foreign policy research organization. It is funded by a mix of government contracts, defense contractors, foreign governments, and private foundations. Critics across the political spectrum — libertarians who want fewer overseas commitments and progressives who distrust defense-industry influence — have raised concerns about whether CSIS analysis consistently reflects those funding interests.

CSIS is an interested party in debates about defense spending and alliance commitments, and readers should weigh its framing accordingly. CSIS research is regularly cited by both Republican and Democratic administrations, and its analyst roster spans a genuine range of strategic views. Dismissing its events wholesale because of funding sources would mean ignoring some of the more rigorous open-source defense analysis available.

The Strongest Arguments on Both Sides

The argument for scaling back U.S. alliance commitments goes like this: America has long been pressed to carry a disproportionate share of collective defense costs, European and Asian partners have grown wealthy enough to do more, and U.S. fiscal constraints limit what it can credibly promise. Overextension isn't strength — it's a liability that adversaries can exploit.

The counterargument, which has dominated U.S. foreign policy establishment thinking across administrations, is that alliances multiply American power at a fraction of the cost of fighting alone. Abandoning or hollowing out those frameworks doesn't save money. It invites the kind of regional aggression that eventually costs far more to reverse. South Korea and Japan host U.S. forces in part because forward presence deters China and North Korea before a conflict starts.

Both positions have real evidence behind them. The forum's framing — "What Must America Defend" — suggests CSIS is willing to put the question directly rather than assume the postwar consensus as a given. Whether the event produces anything actionable, or functions primarily as a networking event for the foreign policy establishment, will depend on who shows up and what they say.

A Note on Sources

The CSIS source for this article is an events calendar page, not a substantive report or policy document. It lists upcoming forums, names programs, and describes logistics. There is no published analysis, no named speakers confirmed in the source, and no policy positions attributed to CSIS on the June 30 forum's specific content.

What Comes Next

The June 30 forum is the most consequential of the three CSIS events scheduled across that stretch of the calendar. The open, unresolved question heading into it: whether the Trump administration, which has pushed allies harder on burden-sharing than any recent predecessor, will have senior representation present, and whether CSIS will release public transcripts or video that allows outside scrutiny of the arguments made. The June 30 event is listed as both in-person and webcast. If that holds, the substance of those debates will be publicly accessible rather than confined to a closed room.