Are you saying think it's ok for a president to ask other governments to open investigations on their political rivals to help them get re elected?
Or are you saying you don't think Trump asked Ukraine and China to investigate Biden and his son because he thought it would help him get more votes if Biden were nominated. Basically it was just a coincidence that Biden happened to be his most likely General Election opponent.
Or is it something else I'm missing?
I see nothing wrong with asking anyone to open an investigation if there is suspicion of a crime. I'm all about criminals being investigated, and even more importantly...and much more rarely...actually prosecuted. Being a politician should not insulate one from investigation into wrongdoing or give someone a free pass for criminal behavior. That's a big problem that the U.S. and many other countries have and part of the reason why we have such corrupt governments.
If politician A asks country B to investigate a non-existent crime against politician B for political reasons then politician A is committing a crime for which he/she can be punished. That's the deterance. If politician B is guilty of a crime then it's doing the world a favor to pound his balls flat.
Here's an idea: How about if the political parties put forward candidates who are not criminals? Someone should try that someday.