When a candidate is authentic in delivery of advocacy points, their speech is a natural flow of thoughts and ideas they create in verbal delivery. However, when a politician is delivering a speech constructed for them, using the thoughts of others, you will notice a cadence constructed around a series of soundbites that are strung together.
Utter rubbish! Any good snake oil salesman or televangelist(and too many other preachers) is capable of this without actually believing a word of what they say, e.g. BJ Clinton, Barry Soetoro, Jim and Tammy Baker, the rev. Al Sharptongue, Jesse Jackyour Wallet, Jim Jones among others.