The "lied about supporting the Republican nominee" thing is wrong, I don't know why the media is peddling that.
Kasich, Bush, Cruz, etc didn't pledge they would endorse Trump. The "pledge" was that they wouldn't run 3rd party and it was obviously just done to take Trump's leverage away incase they wanted to or had a chance to ratfuck him.
Wrong, they each SIGNED a pledge stating they would support whoever the Republican nominee was.