Did you listen to the entire phone conversation and not the 4 minute clip? That's quite not what happened. Trump laid out all his claims and was asking them to accept investigating anything that cloud make up his very narrow margin.
Another fun fact about that call, it was a Settlement Call. That was literally protected by attorney/client privileged. Barnes, a civil rights attorney who does federal cases, and who is currently contracted by the Trump team, talks about it here(starting at 54:49):