Jefferson leaves Paris and attends the Constitutional Convention

Jefferson hit his pro-abolitionist high water mark during his time in France with Sally and her brother the latter of which he publicly freed when he got home and the former, well, we don't know what happened to her papers other then she died for all intents and purposes a free woman living on Jefferson's plantation with her sons that Jefferson petitioned the state legislator to free and give an acre each of his land to build a house on.

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He was never quite that strident on the issue of slavery before or after. The question is what would have happened if he showed up at the convention for whatever reason? Could he have convinced the Southern delegation, Washington first and above all to support a staggered end of slavery say by the 1830s?

What other changes could have happened if he was there?
 
I hope so. I have my doubts, though. Politicians have a way of changing their opinions to match their location and the people they're talking to. If that's what Jefferson's doing, then he'd only maintain this stance in the convention if the convention were in Paris and he was talking to Parisians.
However, it's possible he had a genuine change of heart, and would push for genuine change. If he did that at the convention, he would probably be quite influential.
 
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