Furthermore, he actually thinks there should be a UN, a global governance to 'manage' the world.
But to Trump, Bolton has never said the Iraq invasion, to my knowledge was a mistake. Something, Trump based part of his campaign on.
You're confusing Donald Trump with Barack Obama, it seems.
Trump has been all of the map on the Iraq War and didn't run on the issue since it was old news by 2016. Obama, on the other hand, made his opposition to it the centerpiece of his campaign and ran as the anti-GWB candidate.