As he continues to try to position himself as the go-to candidate for minority voters in an all-white field of AG contenders, Sen. Eric Schneiderman is preparing to roll out a new TV ad featuring some of the state’s highest profile former African American elected officials.

A source familiar with the spot said it will feature former state Comptroller H. Carl McCall, former NYC Mayor David Dinkins and former NYC Comptroller Bill Thompson, among others.

Both Dinkins and Thompson have formally endorsed Schneiderman to succeed Andrew Cuomo as the state’s top attorney. McCall so far has not publicly declared a favorite among the five Democratic AG contenders.

According to this source, McCall was shooting the ad as recently as today.

This ad, which will undoubtedly be released soon, will be the third released by the Manhattan senator’s campaign. (The first has yet to hit the airwaves. The second highlighted Schneiderman’s Times endorsement).

It’s the culmination of a steady roll-out by Schneiderman’s campaign of African American validators, including Buffalo Mayor Byron Brown and (reportedly later this afternoon), the Rev. Al Sharpton.

Sharpton will likely be featured in pre-primary literature for Schneiderman, I’m told.