<P> One - term Democratic Senator Tim Kaine was elected with 53% of the vote in 2012 . He will be 60 years old in 2018 . He is running . </P> <P> Prince William County Supervisor Corey Stewart and Ron Wallace are seeking the Republican nomination . </P> <P> Three - term Democratic Senator Maria Cantwell was re-elected with 61% of the vote in 2012 . She will be 60 years old in 2018 . She is running . </P> <P> Jennifer "GiGi" Ferguson is running . </P>

Which u s senators are up for reelection in 2018