Honestly, I really don't understand why a populist left party doesn't pursue this.
No tax on income below $100K and no tax on wealth, property and inheritance below $1M.
Or choose some other figures.
It seems like it would be a slam dunk to get voter support.
The Dems should call his bluff and propose a constitutional amendment allowing three terms, perhaps under the condition that sitting presidents must win an open primary to be eligible for a second or third nomination.
FDR had three terms, plus a few months of a fourth term.
IMHO, the bigger issue is not having three terms, but the fact that sitting presidents can get the nomination without winning a primary. This practice removes an important opportunity to replace them.