After the Feds killed Randy Weaver's wife and kid, they arrested Weaver. At trial, they offered 50 witnesses against Weaver. Then, Weaver's defense attorney decided not to present a defense. He didn't call a single witness. The jury acquitted Weaver. Wow. The FBI ended up firing five of their own, and one of them was charged with a homicide offense by state authorities.
But, in this case, the Trump team is deciding to present a defense when they don't have to do so, because, after all, this is a political trial, not a criminal trial. Never turn down an opportunity to speak in politics.