Marka Willis uu u soo guuray Texas sanadii 1948, guursaday, wuxuu u shaqeeyay ololihii senate-ka ee Lyndon B. Johnson. Ka dib markii uu ka soo qayb galay shirweynihii xisbiga dimuqraadiga ee 1956
, 1960, iyo 1968, wuxuu noqday saaxiib iyo lataliye Madaxweyne Johnson.