The Classification of Political parties listed on TheGreenPapers.com.

1. Major Parties (those parties which received electoral votes through winning a plurality of a state's [or the District of Columbia's] popular vote in any presidential election between 1984 and 2016)
   1. Democrats and affiliates
   2. Republicans and affiliates
2. Third Parties
   1. Major Third Parties and affiliates (any Party, other than a Major Party [as defined in 1. above], receiving a minimum of 15/100ths of 1 percent of the nationwide popular vote in any presidential election between 1984 and 2016 and which fielded candidates in the previous presidential election [2016] are hereby defined as "Major third parties" for the purposes of "The Green Papers" website. Excluded from this are non-party Independent bids for President which received at least 0.15% of the nationwide popular vote. See Criteria for including Major Third Parties.)
   2. Other Third Parties (i.e., not a Major Third Party)
3. Independents (covering Unaffiliated, Nonpartisan and all the other synonyms/euphemisms for Independent)
4. Write-in/Scattered/otherwise not readily classifiable

1. Republican
   
   1. Incumbents, candidates, and links to state affiliates
      1. 451 Incumbents
      2. 1176 Candidates