The traffic information passed to the Blackhawk by the Controller was a little ambiguous, he should've called in the position of the landing jet also, (traffic is left 11 o'clock etc..). The Blackhawk called visual and asked to avoid visually, (he then accepts responsibility for separation).
I believe the Blackhawk pilot was actually visual with another aircraft and therefore looking elsewhere...
As for Trump, well he couldn't wait to make it political which was disappointing to hear and disrespectful to all affected by this accident. He had a point about about recent recruitment "issues" within ATC (made worse due to COVID), however there's a time and a place...