Jon Snow is also saying the impeachment is valid, so that's another bonfire pissed on.
The process of impeachment is complete, despite you finding one lawyer who says it isn't. I'll point it out again: if that argument could hold any water the Republicans would be championing it. They're not, that really should tell you something. The process of impeachment is complete. The process of the impeachment trial, a second stage independent of impeachment, has not been begun.
The fact that the two are distinct and separate is there in black and white in the Constitution.
Nope.
I will explain AGAIN exactly why and how you are, in my humble opinion, probably wrong.
The Republicans want a trial in order to clear their man. It is not in their interest that the articles be withheld. That's why they are not championing the nullity of the articles. Though they could do in the future. At present they cannot hold a trial because the House has failed to deliver the articles, as prescribed in the Constitution. They are alive, but just sitting on Nancy's desk.
There is no exact analogy in state or local law. But we can get very close.
Let's say a Grand Jury accuses a man of a crime. The Grand Jury, similar to the House intelligence and judiciary proceedings, denies the accused access to its proceedings, witnesses and evidence. No cross examination or exculpatory evidence can be presented. The accused has no attorney present at the Grand Jury, nor necessarily any knowledge that the Grand Jury even exists. After the Grand Jury has deliberated and turned the case over to the prosecutor (Nancy), let's say the prosecutor finds the evidence lacking, new exculpatory evidence or witnesses unwilling to come forth, and does not deliver the case to the court for the jury trial the accused has demanded to prove his innocence. In this case, the trial judge must and will drop the charges against the accused. He is free to go with his record unstained. The man has an unimpeachable record.
The difference in this impeachment case is that there is no presiding trial judge available to drop or quash the charges the prosecutor has failed to deliver to the court. In our reality the articles of impeachment will probably be delivered to the Senate and the process will continue as prescribed in the Constitution.
In the unlikely event that the articles continue to sit on Nancy's desk and no trial takes place, the question arises as to the fate of the articles. I know that the articles will remain viable for delivery to the Senate for the life of the Congress. This Congress expires next November. If they haven't been delivered by then, I expect (but don't know for sure) the articles will die with the Congress.