transcript critical. thanks. let s bring in our senior analyst. as lauren explained, there is stuff he cannot answer. but at least there say transcript of what was asked even if he doesn t answer for the public. you talk about what a key witness he was for mueller and what a key witness he is now on this front on any obstruction, potential charges. can you explain why today is so important even though it is two years after they asked for it? it s crucial what will thoop d will happen today. it also underscores the travesty of this. we ve known the gist of don mcgann s testimony. he is the single most important witness to the single most flagrant obstruction of justice in the mueller report. donald trump instructed don mcgann to fire robert mueller and then trump called on mcgann into the oval office and told don mcgann to lie about that