MSNBC is replacing one David with another on its 6 p.m. program, “1600 Pennsylvania Avenue.”

NBC’s competitors are anticipating an opportunity to alter the dynamics of Sunday morning talk shows, after a long period of dominance by “Meet the Press.”

NBC News officially announced that its longtime correspondent would become the permanent moderator.

David Gregory will be the sole anchor of MSNBC’s coverage of the presidential debates and election night.