Party leaders are big fans of conventions because: n Sponsors must swear that they know the candidate personally and consider him qualified for the office he is seeking.
n The convention system gives them opportunity to take care of the other party business besides nominating candidates.
m Candidates can judge whether they are in line with the rest of the party
m The party can "fine-tune" its organization, finding where it is weak and working to correct the weakness.
n They can rally the party faithful with platforms for debate and decisions.