MSNBC host Rev. Al Sharpton said Thursday that he is “engaged in immediate conversations” with the White House to find a replacement for Attorney General Eric Holder, who has just announced his resignation.

“The resignation of Attorney General Eric Holder is met with both pride and disappointment by the Civil Rights community. We are proud that he has been the best Attorney General on civil rights in U.S. history and disappointed because he leaves at a critical time when we need his continued diligence most,” Sharpton said in a statement released shortly after Holder’s impending resignation was first reported.