A coded message. Match the president to their term of office to decode the message. You can see how well you are doing as the message develops. You can also use the partial message to figure out the ones you don't know.
message (backwards) reads:
!MEOP EHT EMAN WON ,KO .EERF EHTAERB OT GNINRAEY SESSAM DELDDUH RUOY ,ROOP RUOY ,DERIT RUOY EM EVIG