Donald Trump just lied about opposing the Iraq War before it started. Here’s proof. - Vox
The article notes that there is a recording of Trump saying in 2002 (without much enthusiasm, but still) that he supported the Iraq War.
The rest of the article bemoans how the media knows that a serial repeat liar who continues repeating a lie, will more or less get away with it.
But really, why should this be: why cannot a reporter play the audio to his face and say "why have been repeatedly lying about this?" Why not do it as part of the Presidential debate - just play the tape, and see how he tried to deal with it?