Answer: dde

AnswerCrossword Clue
DDE

ETO commander

DDE

Ike's monogram

DDE

Preceded JFK

DDE
HST successor
DDE
Ike
DDEHST follower
DDEHST's follower
DDEJFK's predecessor
DDEJ.F.K.'s predecessor
DDEFive-star general and president's initials
DDENASA's creator
DDE1950s monogram
DDERMN's onetime boss
DDE117 Down's successor
DDEH.S.T.'s successor
DDEHST's successor
DDEPOTUS after HST
DDEWhite House monogram
DDEJFK predecessor
DDE34th U.S. pres.
DDEAES defeater
DDEPres. who appointed Earl Warren
DDERMN was his running mate
DDE'50s monogram
DDEIke's initials
DDEPres. when SEATO was formed
DDEPresidential monogram
DDE"I Like Ike" initials
DDEOperation Overlord monogram
DDEPres. who championed the interstate system
DDEHe followed HST
DDE'50s pres.
DDEWWII general who became pres.
DDE'50s political monogram
DDEPres. before JFK
DDE34th pres.
DDELast pres. born in the 19th century
DDEPres. during Brown v. Board of Education
DDE'50s political initials
DDEFive-star gen. of WWII