Their interpretation of TDS is total bullshit. Any honest and accurate criticism of Trump can be - and is - dismissed as accusation of the other having their TDS.
Research has taught us so many minds are averse to facts. Krugman has struggled to inform with facts all his life and it must really hurt him to see his factual stuff having little to no effect on the minds of Republicans. All of his stuff quoted in that article was true. The TDS bullshit is just that.