You are incorrect. Your definition is for some
thing, not someone. In common understanding and usage the situation I described is not one where the politician is lying, it is one where he is being a deceptive dirtbag. One might say the campaign is a lie, as that is something, but not that the politician is lying, as that is someone.
You can see this again in the Oxford English definition, which similarly reserves the second definition for situations.
http://www.oxforddictionaries.com/us/definition/american_english/lie#lie-2
Need more evidence? Note you said the politician was lying, a verb, but cited to the definition of a noun. Looking instead at the definition of the verb, we note that it requires telling of lies or false statements, not merely misleading statements.
In addition, while dictionaries are useful sources for this type of argument, they do not supersede common parlance, which does not hold all forms of deception to be a lie.
Finally, your burden is not to establish a definition that supports your belief that all deception is a lie. In this case, you have to prove the intended meaning of the words at the time they were written support that argument. Thus, you need references to dictionaries existing at the time of the original writings.