Much like the D5 storyline drew out the GHWB funeral response, the US/NK summit was designed to draw a response. That response was the Cohen hearing.
Gaetz and Patton have both mentioned blackmail. Now, the subject can be introduced in a subsequent hearing: 'Mr. Cohen, are you familiar with speculation that you are being blackmailed?' 'Mr. Cohen, under oath, are you being blackmailed?'
'Yes'.
How do you introduce evidence?