Remember these headlines from the spring?

Jeremy Corbyn is a 'disaster', says Stephen Hawking
Britain’s Upcoming Election Could Be Brutal for Jeremy Corbyn and the Labour Party
Why Labour’s 2017 defeat could be much worse than Foot’s 1983 disaster

Fast forward to the present.

The Economist

NOT even Jeremy Corbyn could quite picture himself as leader of the Labour Party when he ran for the job in 2015. After he became leader, few could see him surviving a general election. Now, with the Conservatives’ majority freshly wiped out and the prime minister struggling to unite her party around a single vision of Brexit (see Bagehot), the unthinkable image of a left-wing firebrand in 10 Downing Street is increasingly plausible. Bookmakers have him as favourite to be Britain’s next prime minister. Labour need win only seven seats from the Tories to give Mr Corbyn the chance to form a ruling coalition.

Labour only needs seven seats because even after the general election, Labour has continued to win by-elections.
This trend toward Labour is reflected in the polls.

"We are now the mainstream", Jeremy Corbyn has declared as he gears up for a conference billed as Labour's biggest ever.
...overall voting intention was 44% for Labour and 40% for the Conservatives.

The polls are especially strong for Corbyn over May.
The reason for the continued decline of the Tories is Brexit.
PM May threatened a 'Hard Bexit' with Europe, and Europe called her bluff.
Now she has no other cards to play, while the hard-liners in her administration are making angry noises.

Corbyn, OTOH, took the opposite approach with Brexit.
He refused to be pinned down to a firm position, to the chagrin of the neoliberals in the Labour Party. He seems to lean toward a 'Soft Brexit', which is closer to what a majority of the public wants.

“The election has changed politics in this country. We are now the mainstream. The government lacks any sense of direction. They are hiding behind parliamentary power grabs to avoid scrutiny,” he said, vowing to disrupt May’s attempted changes in the Commons.
“We will use our strength in parliament and our support in the country to challenge the Tories at every step. Wherever we can, we will block their attempts to pay for tax cuts for the richest by making life worse for millions of people.”

Corbyn has been touring the UK and intentionally holding rallies in Tory districts.

One last thing, which I think is a totally classy way to deal with a jerk.

Piers Morgan has revealed Jeremy Corbyn prevented him from joining a conversation the Labour leader was having with Arsenal footballer Hector Bellerin by continuing the exchange in Spanish.
...He wrote: “Later, fellow Arsenal fan Jeremy Corbyn came over to speak to him. When I tried to interrupt, the Labour leader – whose wife is Mexican – promptly switched to fluent Spanish to shut me out of the conversation.”
According to Mr Morgan, he then asked the Labour leader what he’d said to the footballer.
He wrote: “Corbyn smirked. ‘I told him to please send Arsène Wenger my very best and assure him he continues to have my full support, even if he’s lost yours, Piers. In fact, particularly because he’s lost yours…’”