I can think of several.
We have several more or less conservative news channels — Newsmax, The Blaze, One America. We need an over-the-air presence.
Right. Which all serve niche markets. A Trump network would be more of the same. And yet the suggestion is Trump devote millions of dollars to establishing such a network. A network, which would need to be, "all Trump all the time" in order for it to succeed in the brief moment it was on the air before Trump saturation sets in and people tune out.
Like I said, these are the pet political fantasies of the unsatisfied conservative.