Why? He didn't say he is giving up on fixing 2020. In fact, it is still true if 2020 gets fixed and constitutional republic restored. I wonder how many laws post 1871 will be completely null and void, which would include term limits. It would also include women's right to vote though so they'd probably have to do some kind of continental congress to reform and agree on changes.

Just saying, not a bad thing. Conditions are there that make the statement mean almost nothing other than he would run again.