I think this will take place behind closed doors. Smith wants to testify in public to make a public spectacle...
Hold the interrogation in a SCIF. Then leak selected answers to the press and prohibit Smith from making any public comments. Declare all records confidential.
It worked for Adam Schiff.
EC
Quite possible.
But...if he pleads the 5th, that’s his answer. I don’t think he can do that, grandstand, then go back, etc.
My thought is that it would be public to get his refusal to answer in the public venue. Politics and PR as opposed to getting answers, imo.