With labour nothing but a has been party it would be a stupid, incompetent prime minister that did not call a snap election in the present circumstances

That has-been party has to agree to the election in the first place and if it did not believe there was a chance of regaining some lost ground it would not have done so. I don't do predictions but no politician on any side is stupid. Dishonest and self serving maybe but stupid, no. We are in a situation where one side believes in one outcome and one believes in another. Given the inaccuracy of recent polls, anything could happen!

DtG