claim: on running for re-election to u.s. senate
author: marco rubio
evidence_1: elections to the united states senate will be held on november 3, 2020, with the  33 class 2 ..... two-term incumbent democrat jeff merkley was re-elected in  2014. merkley may run for president and not for re-election to his senate seat.
evidence_2: sep 7, 2017 ... all eyes will be on the u.s. senate in 2018 with several key seats up for grabs in  ... it's not for lack of opportunity: 33 senators are up for re-election in 2018, ...  here's a race-by-race look at the key contests we're watching, with ...
evidence_3: elections to the united states senate were held on november 6, 2018. thirty- three of the 100 seats were contested in regular elections, while two others were  contested in special elections due to senate vacancies in minnesota and  mississippi. the winners were elected to six-year terms running from january 3,  2019, .... some senators were "re-elected", some were a "gain" in the seat from  the ...
evidence_4: u.s. senate, 0, 3, 3, 1, 2, 3. u.s. house, 18, 34, 52, 3, 14, 17. total, 18 ...
evidence_5: class i terms run from the beginning of the 116th congress on january 3, 2019,  ... election, unless they took their seat through appointment or special election.