A) Point out the need:
This could be either to urge a change (point out what is wrong now) or to demand the preservation of present conditions (point out the danger of change & ramifications if they do not vote for you)
B )Explain the need:
* Give additional facts, examples, quotations to make the need convincingly impressive.
* Show the importance to individuals in the audience (Give examples of what your audience is now in need of)