lol, what? Those two things aren't comparable at all.
The election challenge/review process doesn't take a long time. The only time we're still here talking about this seven months later is because griffin and the state appellate courts intentionally drew out the process in a bad-faith effort to try to change the result of the election. It didn't take seven months for Griffin to have "due process." He got his due process, then kept initiating more and more processes because he was trying to engineer the result he wanted.
As for Trump, he is simply wrong that due process makes immigration deportation cases take too long. The immigration system has handled millions of cases and deported millions of people over the last few decades, most of which don't actually require a full "trial" in any sense of the word. But in any event, if Trump wants to speed up the deportation cases, he can hire a bunch more immigration judges and move things through the system faster. Lots of people would appreciate that reform. Instead, though, he's firing immigration judges. Because he wants a procedure where there is no real evidentiary hearing and no real process to challenge whatever accusations are being made against you. Trump thinks that his justice department should just get to say that someone is MS-13 and that should literally be the end of it.