The US only spends 3% of GDP on defense. Poland is the highest at 4% and plans to go to 5% next year, but I don't see others getting up that high.
As for Trump continuing to supply military aid to Ukraine, there are so many caveats to that statement.
He wants an immediate ceasefire (presumably along current lines), which is a basically non-starter for both sides.
Putin at his end of year press conference maintained his full capitulation demands from 2022.
Zelensky wants credible security guarantees.