Trump and the impeachment thing...?

He sort of does try that defense when he claims that the "perfect" phone call was not about quid pro quo.  However, the facts are overwhelming and include an official abbreviated transcript of that "perfect" call wherein he clearly conditions aid to Ukraine on pursuit of investigation into Biden. 

So, no one that has any real knowledge of the situation sees that denial of the facts serves a purpose and realizes that denial cannot be a valid defense.  This means that the only defense that can possibly work is to simply say "yah, so what, it isn't all that bad".  The fact that they "do it all the time" is a problem for me, and loads of people like me, but there are loads of people who don't care that the president is a criminal.  And that is the defense: it does not matter if he is a criminal, he isn't criminal enough to be fired from office.  It is a pretty weak defense but it is all they have.

Because he published the phone call summary and we can all read it.

BECAUSE YOU LIBTARDS WANT TO CHANGE THANKSGIVING TO SUCK SATAN DAY! CHECKMATE LIBTARDS.

At least I'm pretty sure that's how a reTHUGliKKKlan would answer your question.

Didn't do what?

Didn't pressure Ukraine into investigating impeachment?  SURE!!  He did that.  He admitted that from the start.  The problem Dems have is that this, in and of itself, is NOT illegal nor an impeachable offense.

It can ONLY be a crime or an impeachable offense if the Democrats can PROVE … not just assume or claim it's "obvious" but PROVE … that the ONLY reason he did so was to gain an advantage in the election.  That's what has to be proven.  And that is precisely what Trump is saying he did not do.

Because of the multiple witnesses heard from and multiple witnesses yet to be heard from.

he totally did it

Because he did it. Trump is guilty as sin. 

The facts of the case are not in dispute, except among the most fantastic conspiracy theorists.

His lawyers  will  Democrats are   project their  crimes into  him 

Democrats  have a long  history asking other  countries for  help