Sorry maybe I put the question wrong, what I meant was, is there any scenario where trump is able to delay/postpone/deny mid term results if it is unfavourable to him?
I don't think likely. We have a cultural momentum on regular elections that would make a postponement very alarming for people. And since it is run by states, he would have a hard time actually stopping them. I think instead he might say that they should be postponed because of fraud and then selectively denounce particular elections as fraudulent when his guy doesn't win and try to bring pressure to flip those particular ones while taking the wins in other places where he gets them.
100% he would try and I'm pretty sure they can come up with some scheme. His success rate would be higher than in 2020, simply because he would have a federal executive much less constrained by internal pushback, federal and state congressional branch much less willing to check him and more likely to support or legitimize whatever scheme is proposed, and parts of the judicial branch more willing to allow his efforts to proceed. In 2020, key guardrails held. One example is that VP Pence refused to take actions Trump pressured him to take regarding the certification process. There were also multiple other points of resistance against his illegal scheme in Georgia and other states. Now imagine 2020 with today’s executive and congressional makeup. VP Vance has publicly supported alternatives to certification (new electors for example). Congress would be more likely to align with that kind of scheme rather than push back. As for the courts, it is uncertain how quickly or decisively they could intervene in time to affect certification deadlines. This is just one simple clear example. You can extend this reasoning to many other scenarios w.r.t midterm as well. You cannot imagine all possible scenarios. So yes, he would try, schemes would be proposed, and attempts would be made, with a higher likelihood of success than in 2020. Will the system hold the way it did in 2020? Probably, but less likely.