Answer:

rmn

AnswerCrossword Clue
RMNL.B.J.'s successor
RMNLBJ's successor
RMNLoser to JFK
RMNAfter LBJ
RMN1972 GOP monogram
RMNVeep before L.B.J.
RMNMonogram of the president who created the EPA
RMNVeep before LBJ
RMNHe preceded GRF
RMN1968 defeater of HHH
RMNDDE's veep
RMN1960s-'70s White House monogram
RMNHe lost only Mass. and D.C. in 1972
RMNWatergate monogram
RMN1960 debate monogram
RMNLBJ successor
RMNPres. who resigned in '74
RMNLBJ follower
RMNFirst pres. to visit China while in office
RMNGRF succeeded him
RMNGRF's predecessor
RMNJFK debater in '60
RMNPres. after LBJ
RMNDDE's running mate
RMNHe defeated HHH in '68
RMNFollower of LBJ
RMNWhite House inits.
RMNSuccessor of L.B.J.
RMN'70s White House monogram
RMNInitials associated with Watergate
RMN"I'm not a crook" monogram
RMNPolitical monogram
RMNHe followed LBJ
RMNPresidential monogram
RMNJFK debate opponent
RMNSan Clemente initials
RMNSuccessor to L.B.J.
RMNLoser to J.F.K.
RMNG.R.F.'s predecessor
RMNWinner over G.S.M.