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- Negotiations on a deal on the border and aid could collapse thanks to Trump.
- He put pressure on the bipartisan deal he called "meaningless," leaving Republicans scrambling on what's next.
- The chaos hurts Ukraine in particular, as its troops fight Russia without new US aid.
Republicans and Democrats have spent weeks carefully negotiating a massive, bipartisan immigration and foreign aid deal, leaving Ukraine in a wait-and-see position on critical support.