My understanding any changes involving the Constitution would forbid him from running again.
Exactly, which is why this professor is complete full of "Democrat platform" (see Reagan joke).
Any change to a term limit will not have an effect on the current incumbent. Period.
The two-term limit set as a result of FDR during Truman's presidency didn't affect Truman, but it affected Eisenhower and later. This professor is so completely ignorant as to boggle the mind.
Like anyone in the Obama White House has been paying attention to the Constitution......