Unlike Russia, Ukraine evidently doesn't have any kompromat on Trump or the Republican Party in general.
1: https://www.yahoo.com/news/articles/us-military-aid-ukraine-...
Then you probably should accept that proxy wars work both ways. And well, it's not really Iran's fault that its borders has crept so close to the US military bases.
The one thing you can say about Iran is that they were absolute morons not to actually build or otherwise acquire a nuclear arsenal. They had decades. If Pakistan could do it...