I think I understand why he is voting against certificstion, unless an audit is done, and it not an underhanded devious reason.
Remember that half the voters by the survey in his statement, even some Republicans and independents, are still not sure there was fraud. These are the people who get their info from MSM and are generally clueless. I think the audit ploy was not to sabotage Trump, but to give a public, undeniable option to look at it for the public just now figuring out something is wrong.
An audit, could without a doubt clear the minds of the undecideds. However, I think Cruz knows the offer will not be taken up for fear of exposing the fraud. All it would take is a little in each state to be revealed for people to believe it was rigged. The floodgates would open.
Now, do I agree with this approach? No. But I can uderstand why it was taken.
It's been done before, in 1876, Tilden and Hayes, an electoral commission to resolve the dispute, so it has precedent. That one was fifteen people, 5 selected from the House, 5 from the senate, four supreme court justices and the senior supreme court justice. In our case, present day, if they go with the same configuration, I think the senior supreme court justice would be Clarence Thomas, and he'd be president of the commission. If "senior" means longest serving. It will mean a crap ton of evidence will be scrutinized, and that's good.