 In 1990, Daub challenged the state's other Democratic senator, J. James Exon, for reelection, easily winning the Republican nomination, but losing the general election by a substantial margin to Exon.In 1995, Daub won a special election for Mayor of Omaha following the resignation of Mayor P.J.Morgan, and was narrowly elected to a full term in 1997, both times defeating city councilwoman Brenda Council.