So far, the white house is sticking with the classic "I am rubber, you are glue..." response to Comey's testimony.
"The President is not a liar, you're a liar!" is maybe not the best legal defense they could have come up with. It will be interesting to see the official response from his lawyers shortly, though far less interesting than if they would just give Trump his twitter phone back again.
Think back to how Trump responded to attacks from Rosie O'Donnel, or that Miss Universe lady he called Miss Housekeeping. Look at how he has responded to all of the lawsuits he's lost. The man doesn't understand humility, but maybe his lawyers can convince him to say something like "In this instance, I understand how my innocent intentions might have been misconstrued as an attempt to interfere with an official FBI investigation, and for that I am deeply sorry. I will endeavor to communicate my true intentions to my staff more clearly and thoughtfully in the future" and then all of his problems would go away and he could go on playing President. Instead, I'm betting he leads with "I never said that! James Comey is a dirty liar and a masturbator! SAD!!!" or some variant thereof.