What are the limitations on running upper house for reelection?

Limitations on running for reelection to an upper house, such as a Senate, often include term limits set by state or Federal Laws, which can restrict the number of consecutive terms a candidate can serve. Additionally, some jurisdictions may impose age or residency requirements, and candidates may face restrictions based on previous conduct or legal issues. Political party rules and primary elections can also limit a candidate's ability to run for reelection, as they may need to secure party nomination to be on the ballot.