"No politician will back nuclear. If there's an accident, they'll be run out of town. Not worth the risk."I would not be so pessimistic (or optimistic, depending on one's stance on this issue).
One does not have to look far in our current political landscape or in the history books to find plenty of examples of politicians doing stupid, unpopular, or even criminal things, that one could argue they should have avoided like the plague before they even started.
When or if those things fail, if the politicians get caught, or if there's some public outcry, it rarely lasts. The news media has a very limited attention span, and when the story is no longer in the media people tend to forget about it. Not only do most people tend to have a poor memory of political events and poor knowledge of history, but protest movements also rarely last long. Many "disgraced" politicians have managed to make a comeback in politics, and be rather popular, if that's what they chose to do.
The government-corporate partnership is also a revolving door where actors frequently move to highly desirable positions from one to the other. It's quite common for politicians to leave politics and get hired in lucrative positions in the companies they regulated, assigned contracts to, or passed legislation on, and for industry execs or lobbyists to get jobs in politics, after which they go back lucrative jobs in the company they left. Companies have many other ways of rewarding politicians who are on their side.
There's every likelihood that politicians who assigned multi-billion-dollar contracts to corporations will be very well taken care of, even in the event of some sort of political firestorm over their decision. Though politicians tend to also be quite adept at covering their asses and pushing the buck to someone else. "I wasn't told". "I didn't know." "I wasn't the one making the decisions." You can't open the papers these days without seeing those words come out of some politician's mouth.
There are few real consequences except in the case of truly egregious crimes, and even then they tend to be not so bad for white-collar crimes. Not to mention that the politicians tend to have top notch legal teams to keep them out of jail -- that's when they're deemed to not be acting in an official capacity, when they effectively can't be sued at all... and good luck suing the federal government.
Of course, in the case of a truly major nuclear disaster, such lawsuits may actually be successful. But if the risk of such a disaster with modern designs really is so low, then these politicians have nothing to worry about, do they?