When President Trump stopped “intelligence sharing” with Ukraine, what he technically did was stop allowing Ukraine to use exclusive USA targeting systems controlled by U.S Intelligence, the CIA, the National Reconnaissance Office and the U.S. National Geospatial Intelligence Agency.
These terrain mapping systems, the missile and drone targeting systems, are what military forces inside Ukraine need to carry out offensive drone and missile attacks against Russian forces.

In essence and material reality, the elements in Ukraine who are conducting war, and this includes U.K and U.S special forces, the CIA and various NATO allied military operators (not Ukraine military) can no longer effectively hit long-range Russian targets, without the U.S. targeting system that identifies it.
The real-time sharing of military grade GPS encryption keys has been stopped by the U.S. Commander in Chief, President Trump.  Effective immediately without targeting system access, ATACMS, HIMARS, Storm Shadow and Taurus missile systems are no longer functional to those Ukraine operators (remember, those operators are not necessarily Ukranian).
Additionally, the drones that Ukraine has been using also rely on the same accurate, real-time, terrain-mapping satellite data that transmits back to the guidance systems. Without the U.S. encryption keys, what the media is obtusely calling “intelligence sharing,” all of the aforementioned attack systems are rendered moot.  THIS IS HUGE.
The part that is really interesting to those who have followed the events of the past three years, is literally who has been in control of and deploying these missile and drone attack systems.
All of the intellectually honest researchers know that it is the USA (special forces) and to a lesser extent the collaborating U.K (special forces) who have been operating these systems.  Yes, they have been training Ukranians, but they damned sure are not giving them the highly classified and tightly controlled encryption keys within the targeting system.
In reality, this means the USA/UK are the forces doing the actual fighting of consequence against Russia in the geography of Ukraine.  A true and genuine proxy war between NATO and Russia has been ongoing.  This stoppage of the missile/drone targeting system by President Trump is factually exposing this proxy war reality.
 
Now, think about this dynamic very carefully because now we know President Trump and President Putin are talking to each other.
We know Vladimir Putin is well aware of how the Western targeting system is being used in Ukraine; he has talked about it openly and publicly.  However, the West has never admitted it, because to do so would be to inform the public of the proxy war.

With the new information we now have confirmation that these drone and missile strikes into Russia were factually attacks supported by U.S. targeting systems.  The non-pretending reality = The USA attacked Russia using Ukraine.

Source: theconservativetreehouse.com