Have you seen the paintings in Tony Podesta's house? I know art is subjective, but if I saw someone who collects the type of art Tony does, I would stay as far away as possible, and maybe report them for it.
In any case, if there had been any truth in the accusations, Trump had more than enough time to follow all the leads and find something that could be used as a proof. So everything we have is a smear campaign.
[0] https://www.cbc.ca/radio/day6/episode-346-fighting-wildfires...