Boris Johnson needs to throw someone under a bus over Brexit

Manchester, England (CNN)Boris Johnson has set the UK on course for a Brexit showdown. Whatever the reaction to Johnson in Manchester, it doesn’t change the scale of the challenge he faces both in Westminster and Brussels. Johnson later published a letter to the EU Commission President, Jean-Claude Juncker, setting out plans for a new Brexit deal, the existing one having been rejected three times in Parliament. Downing Street briefed before the speech that this would be a “final” offer to the EU. If Brussels doesn’t like it, Johnson said in his speech that the UK is perfectly ready for no deal. It’s currently unclear if Brussels will engage with the plans. Johnson’s letter is vague and, on first reading, still …