What Trump was talking about was this article:

As Tensions With Iran Escalated, Trump Opted for Most Extreme Measure https://www.nytimes.com/2020/01/04/us/politics/trump-suleimani.html

Paywalled but you might find it elsewhere. I haven't looked.

Of course they are back tracking because there is nothing here. This entire episode is to poison the jury pool. It is jury tampering plain and simple. It was never intended as a charge or else a NJ grand jury would have been seated to deal with it.