Nicholas Fandos works at the NYT's WashDC bureau covering Congress. This means that the NYT has basically affirmed that the report that the leakblower has or has had a "professional relationship" with a 2020 Democrat presidential candidate is correct.
That the leakblower is a registered D is not a huge deal. That the leakblower has or has had a "professional relationship" with a 2020 Democrat presidential candidate is big enough to render the leakblower's complaint dubious.
So what third evidence of bias is so serious - fatal to the credibility of the complaint? potentially criminal? - that it has been redacted?