Wisconsin Gov. Scott Walker flamed out and quit the GOP presidential primary race. He said he had been "called" to leadership. Only in Walky World would anyone believe that.
The bottom line is that Walky was a crappy candidate, one among a whole field of crappy candidates, a group of clowns each of whom is very much unprepared to be president.
If you want more perspective, here's an editorial piece from the Bloomberg View via the Daily Star.