Nearly 100 former senior U.S. diplomats and intelligence and national security officials have asked Senate leaders to schedule closed-door hearings to allow for a full review of the government’s files on former Rep. Tulsi Gabbard.

How will American leaders and their allies respond if President Vladimir Putin seeks to escalate his way out of his bad situation on Ukraine’s battlefields.

Russia’s assault on Ukraine and its veiled threats of using nuclear arms have policymakers past and present thinking the unthinkable: How should the West respond to a Russian battlefield explosion of a nuclear bomb.