Tomahawk missile transfer by the US to Ukraine would not change the war on the front lines in Ukraine as both sides are entrenched in their positions with not much progress. What it would do is provide capabilities for strikes on oil facilities that cause problems for the economy and standards of living. The idea is to get Russia to the table for serious talks knowing it will have to also make some concessions. US is thinking about how to do this to get to talks without turning this into an escalation. This is why the DJT meeting with Putin in Budapest is planned.