Embattled NYPD Commissioner Tom Donlon is expected to vacate his post as early as Friday after his background check hit a snag — and the city’s current Sanitation Department boss, Jessica Tisch, is seen as the top contender to replace him, the Daily News has learned.

In case you’re wondering, that’s Tisch as in the same Tisch family that owns the Loews Corporation, the New York Giants, whose name adorns the Tisch school of the arts and the Tisch hospital at NYU, and whom the library at Tufts is named after. Which gives you a good idea as to why she’s a commissioner in Adams administration.