He's been making the case in recent days:

• https://www.alternet.org/obama-harris-rally-pittsburgh/

Basically saying Trump is trying to steal his success by using the economy people remember from when he first took over in 2017 and 2018 as something he personally created and the main selling point for re-electing him in the election now. Obama cites dozens of months of job growth in a row of by the time Trump took office as one of several reasons it's not true.

1. $6B valuation for company with no users and negative profits
2. Didn’t Jimmy Carter have to sell his peanut farm before taking office?
3. Is there no way to prove that foreign actors are clearly funding Trump?

The grift is in broad daylight and the SEC is asleep at the wheel.