Problem is you have to explain the chain of evidence when using that of how he got it. I don't think Hillary arrested from leaked video to Trump's lawyer from Trump's administration is the picture they want to paint.
Still the problem of Trump and his lawyer being guilty of Misprision of treason (if he knew before he was president and did not report). If/when it all comes out, a lot of people can easily be put away for 7 years for knowing and not doing anything without having to prove any crimes past that. Going to be Nixon time a billion. Who knew what and when?
https:// www.law.cornell.edu/uscode/text/18/2382