Proper investigation by our Department of Justice . . . absolutely not! Please check my previous posts regarding the Bidens and Clinton. But the key difference here, which it seems far too many here fail to grasp, is that inviting foreign states to do so on political opponents is, at the very least, a serious conflict of interest, and arguably impeachable.
The reason Trump asked Ukraine to do the investigation into Biden's corruption is because that's where Biden's corruption occurred.
It's not a difficult thing to understand unless your brains have been turned to schitt by the constant barrage of lies coming from the Communists in Congress and the Communist media.
