But Nixon & Clinton both started out with witnesses giving testimony behind closed doors. The House is gathering the facts for this one and there will be public testimony and a vote. This is all being done with republican members on those committees having equal time to ask witnesses questions. This is all within the rules that republicans actually used during the Benghazi investigation. Considering you have no problem with Trump pressuring a foreign country to investigate his political rivals I fail to see how you can have a real issue with this but I doubt you'll be happy when the testimony becomes public. It's really about protecting a corrupt president.
