Johnny,

"Data doesn't lie only politicians." is not accurate.  Mark Twain was right as rain when he wrote: ". . . There are three kinds of lies: lies, damned lies, and statistics." (Twain attributed the phrase to British Prime Minister Benjamin Disraeli).

Politicians (among many others) use data to lie or obfuscate all the time because of the implicit confidence we put in them.  In fact, the easiest lie is one backed by "data".  Numbers are persuasive and easily manipulated.