During the July 25 phone call, President Zelensky was unaware Trump had put a freeze on the military aid a few days prior to that phone call. That's why Zelensky began thanking Trump for sending the aid.
Zelensky's main focus during the call, with the misunderstanding the aid was on the way, was a White House visit. That was his second need. He needed aid to negotiate from a position of greater strength with Russia, and he needed a White House photo op to show the world he had strong US backing.
As soon as Zelensky began thanking Trump for the Javelins, Trump said, "I would like you to do us a favor though..."
Trump held up the aid, unbeknownst to Zelensky, and as soon as the aid was mentioned, Trump immediately coupled it to the Bidens and Crowdstrike.
Prior to the phone call, there were several back channel communications between Trump, Giuliani, and Sondland and the Ukrainians about a quid pro quo for the White House get together.
Trump had to eventually release the military aid because the fiscal year was ending.
But he has yet to grant Zelensky the White House visit.
So how do you have a quid pro quo when the party supposedly recieving the quid pro quo has no idea about aid being held up?....You need a victim, and you don't have it!
I will use small words for you.
TWO quos. First, military aid. Second, White House visit.
Zelensky was aware the White House visit was being held up.
The Ukrainian military, and others, were aware the military aid was being held up.
Once Zelenksy was informed of the military aid being held up, then he would understand Trump asking for a favor was a two-fer. White House visit plus military aid in exchange for dirt on the Bidens.