According to Nielsen Fast National numbers, the NBC News/Facebook GOP debate that was part of a special 90-minute “Meet the Press” Sunday morning drew 4.159 million Total Viewers and 1.452 million A25-54 viewers. This does not include viewers who may have watched live at 9amET on MSNBC. Those numbers will be available tomorrow morning. And final national numbers will be released Thursday.

• Earlier: ABC News New Hampshire Debate Draws 6.25 Million