Trump wants to release the first call only because—unlike the second call—it doesn't contain anything incriminating, according to Lt. Col. Alexander Vindman. It's a distraction. 
Why the change in tone? What happened in between the first and the second call with Zelenskyy? In early May, during a phone call, Putin “did what he always does” in seeking to undercut the United States’ relationship with Ukraine. Also, Trump spoke to Putin at the #G20 in June.
Here's Putin and Peskov, having a good laugh at Trump's expense at the #G20. They seem quite pleased.
Also in June. The Russian reporter can't believe what he's hearing.
After his favor-seeking call with Zelenskyy, Trump speaks with Putin on July 31.
Mid-September, Kremlin-controlled Russian state TV urges Trump to keep digging in Ukraine.
Mid-September, Kremlin-controlled Russian state TV urges Trump to keep digging in Ukraine.
Here is why that is relevant:
