Trump halts Budapest meeting with Putin, calling it a potential "waste of time" after Russia's rejection of ceasefire along current lines, following Rubio-Lavrov call yielding no breakthroughs.
Builds on Alaska talks' failure; Moscow insists on full Donbas cession and Zelenskyy ouster, clashing with US/EU push for immediate halt and security guarantees.
Zelenskyy sees delay as Russian ploy to prolong war; Europe advances €140bn aid plan, while Trump eyes future talks amid Ukraine's denied Tomahawk requests and frontline strains.