The whole "Trump rally caused more cases in Tulsa" story was totally predictable. As expected, it's also quite shaky when looking at the data. Cases in Tulsa have shown an upward trend way for a while, Tulsa had already more cases than Oklahoma county before the rally on June 20. 
In terms of growth rates, Tulsa county cases show a single spike soon after the rally (too soon for test results?), but then they grow slower than in Oklahoma county. They've grown faster before the rally.
The next three larger counties of Oklahoma state have lower absolute case numbers than Tulsa and Oklahoma, but cases there have been growing at similar rates. Except the single spike, no escalation in Tulsa in comparison.
Have I overlooked these graphs in the media or weren't they shown? Of course, the rally could have caused a growth in cases across Oklahoma state if attendees arrived from all over the state. Could be tested by comparing Oklahoma counties to counties of states with no rally.
