Wrong on both counts. If trump stops aid to Ukraine he would be in contempt of Congress ans liable for impeachment. Not to mention reaction from voters. trump cannot stop the EU from all aid, it would be the death of democracy in EU, and the EU leaders know it.
Republicans control congress, Trump could nuke someone randomly and they wouldn’t impeach him. They are all complicit in everything he is doing because they want it too or they go along out of fear of his cult. I do agree with you that the EU wouldn’t abandon Ukraine if we did& they could still win.
1. He’s already usurped congressional powers - willingly given to him by the GOP Congress and the Supreme Court. He can do anything he wants at this point. 2. There’s nothing the public can do. There is still more than 50% of actual voters supporting him. And it’s likely there’s not another vote.