But where did that bad hand come from? It was dealt to her by two people: President Biden, who produced a governing record she could not effectively defend or run away from; and herself, with all the toxic position-taking she did in 2019, generating endless attack ad fodder for Donald Trump. And Mr. Biden even bears blame for Ms. Harris’s pre-2020 baggage, since he put her on the ticket in full awareness that she was carrying it.
It is the NY Times style guide. First mention as “President,” then “Mr.” thereafter.