It's not pedantic argumentation. It's a fundamental principle of criminal justice. The state can't just go on vague fishing expeditions based on suspicion of wrongdoing. Even a search warrant requires a probable cause.
You are thinking Judicial Crime, Impeachment isn't based on a written law, but whatever the congress determines to be "High Crimes and Misdemeanors."
Even a murder investigation requires a dead body and some articulable indications of foul play.
This is just factually incorrect. Numerous people have been convicted for murder without a dead body.
Indeed, the whole point of grand juries is to make sure the state takes the time to actually nail down their justification of a specific crime and specific suspect, before going to town on that suspect's life.
And again, you are thinking of a criminal trial, which an Impeachment isn't.
So no, as a practical matter, and as a matter of rule of law, you can't do anything about wrongdoing without first defining the wrongdoing you're trying to do something about.
Again totally incorrect for an Impeachment. What you need to do is show that an action or actions by the President are able to meet the level of High Crimes and Misdemeanors.
So what are High Crimes and Misdemeanors?
The short version is "Anything Congress agrees on."
However it is worth going back to the Federalist Papers and other documents of the time and seeing what the Framers of the Constitution thought when they included it in the CotUS.
Alexander Hamilton: Federalist Paper 65 said:
Impeachment would involve the abuse of violation of some public trust.
Alexander Hamilton: Federalist Paper 66 said:
The Constitution aims to make it as difficult as possible for them to combine any interest opposite to that of the Public Good.
George Mason: The Avalon Project: Madison Debates said:
A President could be Impeached should he have procured His appointment by the corrupting of his electors.
Edmund Randolph: The Avalon Project: Madison Debates said:
Impeachment could be brought about by a President abusing his power through Military Force, or Public Money."
James Iredell: North Carolina Convention said:
It is [The President's] duty to impart to the Senate every material intelligence he receives. If it should appear that he has not given them full information, but has concealed important intelligence which he ought to have communicated, then Impeachment is a remedy.
So the question now is, How does this president's actions compare?
Did he use his governmental powers to try and achieve a personal benefit that is against the Public Trust?
Did he try and gain Electors in a corrupt manner by getting a Foreign State to interfere in the 2020 Elections?
Did he abuse his power by using public money, set aside by Congress for the Ukraine, for the purpose of getting them to interfere by going after a political opponent?
Did he attempt to hold back or cover up any material information about the incident, or attempted to prevent the Senate being fully informed as to what occurred?
If you treat those questions honestly, and find yourself you having to say "Yes" to any one of them, then by the standards of the Founding Fathers, He should be Impeached, or the Constitution might as well be put in a shredder because it is no longer worth the paper it is written on.
Each and every member of the House and Senate swore an oath to uphold the Constitution. They didn't swear an oath to stand behind and support a criminal President.
And this is the thing I really don't get. It seems that the Republican members would rather ride this sinking ship down than to get rid of the cancer that is the current President and replace him with the VP. For me the scariest thing about this Impeachment process is not that some miracle will occur and voters who are fervently anti-Trump will suddenly switch back to supporting him because he gets impeached, but rather that the GOP will suddenly wake up and say "Hey we can get rid of this anchor" and suddenly it's Pence for 2020, because he might actually stand a chance of winning, and the thought of President Pence is way worse than Trump getting a second term if you ask me.
But hey...