The baffling leak of classified U.S. intelligence documents on social media is swiftly unfurling into a debacle for the Biden administration, which is struggling to provide answers to Congress, the public and U.S. allies.
Why it matters: As President Biden kicks off his latest overseas trip — this time in Ireland, his ancestral homeland — the leak is threatening to undermine two defining planks of his foreign policy: strengthening U.S. alliances and supporting Ukraine.