They're repeatedly addressed it. They've said that he was never briefed on it because the intelligence is uncorroborated. The CIA, The Department of Defense, the National Security Advisor, the President, The Vice President, all have said exactly this. https://twitter.com/nytimes/status/1278433239493943303
Secretary of Defense addressing this: https://twitter.com/EsperDoD/status/1278144740471582720
DNI addressing this: https://twitter.com/ODNIgov/status/1277079117234651141
More from the DNI: https://twitter.com/ODNIgov/status/1277772961483759616
NSA addressing this: https://twitter.com/WHNSC/status/1277804151033004032
VP Pence addressing this:
https://www.c-span.org/video/?c4890559/vice-president-briefed-russian-bounties-us-coalition-soldiers
https://www.c-span.org/video/?c4890559/vice-president-briefed-russian-bounties-us-coalition-soldiers
President Trump addressing this: https://twitter.com/realDonaldTrump/status/1278299171523637254
I'm waiting for the New York Times to address why they put out another false Trump/Russia story leaked to them by corrupt officials and refuse to retract their false stories. It'll never happen, they are still pushing the debunked Trump/Russia collusion hoax to this day.