The danger of the Olly Robbins legal challenge

Britain's chief Brexit negotiator Olly Robbins leaves the Cabinet Office on Whitehall in London on March 22, 2019. - Prime Minister Theresa May returned to Britain vowing to make "every effort" to win over MPs opposed to her EU divorce deal, hours after securing a delay to Brexit from bloc leaders in Brussels.

The embattled premier faces daunting odds to convince recalcitrant lawmakers to back a plan they have already overwhelmingly rejected twice by a new April 12 deadline agreed with the European Union.

(Photo by Tolga AKMEN / AFP) (Photo credit should read TOLGA AKMEN/AFP via Getty Images) ...