Going after Obama would have to be Trumps stupidest moves from the 'distraction' play book to date, the racists and bigots were happy with the attack on China and he has already been on the Obama hate run before and calling him out at this point will just be seen for what it is; the flick of the desperation switch to get people talking about anything but how bad Trump has handled the covid response. Perhaps we are getting to bullshit saturation point where no matter how many polished turds flow out of his mouth they are now seen immediately for what they are. Calling out Obama who is many things Trump is not; articulate, funny, relate-able,likeable, good record as president, can close an umbrella etc at this point in time will likley back fire on Trump. The rabid Trump fan boys and girls will still be frothing hate at Obama but many will be thinking gee we had it good under Obama it was like having an adult in charge not a petulant toddler!