It's Trump's financials, the sex trafficking money trail.

I think they’ve had him since the 80’s, first trip to Moscow, he comes back wanting to be president, Ivana was his handler.

Definitely, Putin’s smart and he found someone desperate enough and willing to betray his country. This has been a long time in the making. He probably has a huge file and evidence to blackmail Trump, and that’s why Trump is so scared of him.