It only takes a few minutes to fact-check a thing so either Ted's lazy or it was deliberate.

"Didn’t know it was fake. You guys are so insane, it could easily have been real. But it wasn’t. And so I deleted the tweet as soon as I found out."; — Ted Cruz tweet-whining accusations of insanity over having his gullibility spotlighted, being fact-checked and called out for posting fake headlines.