Unfortunately, Corbyn is not in a position in which he can say let's abandon brexit. Anyone with a brain now realises what a bloody awful idea it is, even though lots of people won't admit it (including a few on here), but brexit demurrals would have accusations raining down about going against the will of the people, undemocratic behaviour, etc., that would see him unceremoniously dumped in any election. Realpolitik dictates that he carries on letting the Tories immolate. Note that he's muted his calls for the Tories to stand aside and let Labour do the deal. That's the last thing he needs. The Father, Son and Holy Ghost working together couldn't make a silk purse out of this pig's unwashed, chocolate-covered arse of a brexit plan. If she called an election tomorrow his platform would have to be firmly pro-brexit. It's a bloody terrible position for this country to be in. However, who knows how things may change in the coming few months. The whole idea may come to look so unattractive that all the parties might agree to dump it. I live in probably forlorn hope.