The Democratic debates on July 30 and 31 were a little less than 3 hours long each. A conservative estimate would be 150 minutes.
150 minutes /10 candidates = 15 minutes/candidate
Now if you were CNN, and you had 15 minutes per candidate to allocate, which of these would you choose?
A. Ask each candidate five questions, allowing her or him three minutes to respond to each.
B. Ask the candidates three questions of three minutes, and let them comment on three other questions for two minutes each.
C. Ask a whole lot of questions and allow candidates sixty seconds to respond to each. If the candidate attacks another candidate, allow the second candidate thirty seconds to respond.
If you voted for alternative (C), your name is probably CNN.