The March 23 primary contests take place in Louisiana and Missouri.

       Louisiana will be holding both Democratic and GOP primaries, and Missouri a Democratic primary.

       On the Democratic side, 112 delegates are up for grabs in Louisiana and Missouri.

       A "Vote Here" signs directs voters to a precinct during the presidential primary elections in Atl...Show more ---Show more

       Elijah Nouvelage/AFP via Getty Images

       Louisiana will be holding a presidential preference contest.

       It's a winner-take-all delegate primary -- meaning it's an election in which the candidate who receives the majority or plurality of votes wins all the seats or representation.

       For example, if a candidate wins 51% of the votes, that candidate wins 100% of the representation.