When British voters go to the polls Thursday, it probably will be their last chance to stop Brexit. If they don’t, Jeremy Corbyn will bear much of the blame.

Wait – isn’t the Labour Party leader running to oust the man actually driving the UK toward Brexit, Prime Minister Boris Johnson? Yes, but polls show Johnson’s Conservatives holding on to a double-digit lead over Labour. That’s remarkable, considering the sorry mess Tory leaders have made of Brexit over the last three years.

If Johnson has the electoral wind at his back, it’s not because he’s so mesmerizing. It’s mainly because of Corbyn’s epic unpopularity with UK voters. A mere 22 percent approve of Labour’s chief, while 58 percent say he’s doing badly. Thirty-six percent approve of Johnson, and 43 percent rate him negatively.

Read Will Marshall’s full op-ed here.