If not for Frannie, this would have been another Monday DNF for me. I know a little too little about religion and/or White House financial advisory groups, because the "B" of BAAL (45A: False god) would not come to me. I also spelled MYNAHS (48D: Bird mimics) with an "I," which Frannie also corrected. Neither of us was familiar with MAMMYYOKUM (52A: Dogpatch matriarch). I assume that relates to a comic strip.
The theme of having four "M"s in six symmetrical answers was ok, I guess. The only one it actually helped me on was the MILLIONMOMMARCH (40A: Washington rally of 5/14/00), because I had guessed "Million Man March" erroneously.
Things like ENORM (12D: Huge, in poetry), RETAB (13D: Adjust the margins again), AROO (34A: Suffix with buck), and MOOED (58D: Made a cow call) turned me against this one. And the audacity of cluing MAC with "67D: McDonald's Big ____" actually angered me a little. I know it's Monday, but really?
Onward to Tuesday!