On Monday morning, 30 members of the Congressional Progressive Caucus sent a letter to the White House that attempted to gingerly open a conversation about a potential diplomatic end to Russia's war on Ukraine. The door was slammed shut by the evening, met with enough fury to elicit a "clarification" in the form of a statement from caucus Chair Pramila Jayapal. "Let me be clear," Jayapal said in a statement issued just before 7 p.m., "We are united as Democrats in our unequivocal commitment to supporting Ukraine in their fight for their democracy and freedom in the face of the illegal and outrageous Russian invasion, and nothing in the letter advocates for a change in that support." On Tuesday afternoon, Jayapal followed the clarification by fully withdrawing the letter, saying it was "released by staff without vetting." That the letter was met with fierce opposition is a measure of the space available for debate among congressional Democrats when it comes to support for the war and how it might be stopped before it turns nuclear: roughly zero. "I have voted for every defense package to Ukraine and stand firmly for Ukraine's sovereignty," Rep. Ro Khanna, D-Calif., a letter signer, told The Intercept. "It should not be controversial to say we need to explore every diplomatic avenue to seek a just peace." "The alternative to diplomacy is protracted war, with both its attendant certainties and catastrophic and unknowable risks," the letter read.