They are lying to you. The documents that Obama's henchmen took when they raided President Trump's home Mar-a-Lago is the evidence of their own crimes.
Here is the most important document, which Monaco and co secretly and retroactively re-classified few weeks before the Raid. It shows that Brennan's CIA operative masquerading as a "Cambridge University Professor" lied that I am a Russian spy who recruited Donald Trump's National Security Advisor. That kicked off the whole Crossfire Hurricane investigation of the senior Trump campaign advisor, then leading into Mueller etc.
So they stole the documents and charged President Trump under the Espionage Act for exposing Obama, Brennan, Comey and co.