Yes he has been showing up on CNN and elsewhere, and he does the same trained sea lion routine as every other Trump "spokesperson" -- yell and constantly interrupt and talk over other commentators (especially women -- I personally find his behavior towards female commentators to be gross), shout ridiculous pro-Trump nonsense, and constantly throw out red herrings about things the Clintons did twenty or thirty years ago with the hope that his fellow commentators will try to respond to the red herrings rather than deal with the issue at hand.
The first time I heard him on CNN I noticed his accent, which is still very noticeable (especially when he is emotional and yelling -- classic for people when they are not speaking their native language). So I looked him up and wasn't at all surprised to see that he was born in Russia and moved here as a teenager.
Yet another Russian connection for Trump -- I wouldn't be at all surprised to learn that Boris has Putin connections himself.