Read and listen to what they say and use common sense. Neither Trump, nor McMasters would say that the information Trump gave the Russians was not classified-- even after being asked. Trump's tweets justify his giving information to the Russians, but he does not say he did not give the Russians classified information. McMasters explained why they could not distinguish classified from unclassified-- he said Trump could not know because the information was both classified and unclassified and Trump could not tell the difference because he was not briefed. The key information was the release of the name of the City the information came from and McMasters would not say that the city was not named-- he said the Russians could figure it out (the Whitehouse told news outlets not to name the City because people would die if they did-- and the news did not-- but McMasters said it was not a big deal).