Was Trump "created" because Republicans can't keep promises?

His crude remarks about Megyn Kelly menstruating, made after Fox News' "Presidential" debate, were disturbingly popular on Twitter and rebuked only mildly by other candidates. That Erick Erickson is seen to have gone out on a limb in dis-inviting him from a wingnut convention says it all. The Republican cabal created Trump, Erickson tells Molly Ball, "because they made a lot of promises to their base and never kept them."