It’s kind of interesting to see how some unscrupulous public data analyst officials in public service tries to promote their interest using manipulation of data. There is a line between persuasive presentation and manipulation. Persuasive presentation is the use of evidence (objective and reliable data) through well developed and ethically approved approaches to get elected officials agree and support what you are endorsing as opposed to manipulation which is the use of unethical techniques and false data to convince people to agree and support your view. Manipulation of data by public analyst happens when public servants doesn’t understand their role. The role of the public servant is to provide objective and unbiased information even if it against their perspectives. They can employ data visual tools and techniques to present data to persuade decision-makers, but it must be done in an ethically acceptable manner and data must be very reliable and objective. It worthy to note that the public service is not the defender of the constitution and they are there to work for the elected (executive). Sometimes public servants miss the point by thinking they are there to work for the public. Its true public servants are serving the public, but they are working for the elected. It is the elected who are working for the public. Manipulation start to happen when public servant think they are intelligent than the elected officials and should be the decision-markers. This has high likelihood to break the confidence for public data analyst and damage the public service reputation as an objective and neutral institution. If the visual representation of data is not compelling when presented, then it better to stick with neutral presentation of facts. I can conclude by saying, visualization tools and techniques are meant to support policy analyst present data clearly in an easily understandable manner,  and that has nothing to do with manipulation or persuasion.