The evidence suggests that he's to blame, but let's be careful not to 'jump to conclusions'. He may have a good explanation for what happened.
At this point, his victory seems to be a 'foregone conclusion'. [=his victory seems certain; there seems to be no doubt that he will win]
Most people felt that the outcome of the trial was a 'foregone conclusion'. [=they felt sure that the trial would end in a certain way]
(..) Jor-El, you are one of Krypton's greatest scientists. Yes, but so is Vond-Ah. I don't question your data. The facts are undeniable. It's your conclusions we find unsupportable. This planet will explode within days. If not sooner. I tell you Krypton is simply shifting its orbit. (..)1978 Superman