Statewide Delegates: Winner Take all if the top candidate receives a majority of votes or the top candidate is the only candidate to receive at least 20 percent of the vote, otherwise delegates are awarded proportionally to those candidates that receive more than 20 percent of the vote. Congressional District Delegates: Winner Take all if Majority, otherwise top-vote getter wins two delegates and the candidate with the next highest number of votes receives one delegate
Source for Popular Vote data: Tennessee Secretary of State Division of Elections. March 1, 2016 Republican Primary Presidential Preference, Tennessee Secretary of State Division of Elections (http://sos.tn.gov/sites/default/files/StateCertRepPresidentCountyTotals.pdf) (accessed 04 Apr 2016)