That is not an admission to investigating for political purposes. Sounds more like he is just stating the truth of the matter. Exposing corrupt practices doesn't help the political party involved regardless of who is in it.
"The more that we expose of the corruption of the transition process between Obama and Trump, the more we expose of the corruption within those agencies, I would think it would certainly help Donald Trump win reelection and certainly be pretty good, I would say, evidence about not voting for Vice President Biden," Johnson said
What unethical and illegal activities get a free pass from being investigated when there is an election?