I have read the the transcripts between Donald Trump and the president of Ukraine. You can read it here.
From what it looks like President Trump is having AG Barr and his lawyer (and former US Attorney and New York Mayor) Rudy Giuliani look into a software company Crowdstrike and the involvement of Joe Biden, Hunter Biden a Ukrainian prosecutor and some shady business dealings.
Hunter Biden went to Ukraine with dad, Joe to set up an energy company where he would receive $50,000 per month, despite no investment on his part and no experience in the energy industry. A Ukrainian state attorney wanted to look at this very unusual activity. Dad told the Ukrainian government that if that government attorney is not fired, Ukraine can kiss one billion in loans goodbye. And according to Biden, the man was fired.
