This isn’t really a new risk, is it? (note: they had no say in picking Lautenberg, but that is beside my point)
Same question to you Sam.
If we assume that most states have provisions that allow the Governor to handpick replacements for (elected) Senators, no matter why they might leave office before completing their term, nothing prevents the Governor’s party from doing the old “bait and switch” everytime.
Take my state, for example. Currently, we have a Democratic Governor, and two Democratic Senators (although some argue about Zell Miller’s true affiliation). This year, Max Cleland’s seat is up for reelection. But assume for a minute that the seat was held by the his original challenger, Guy Millner ®. Cleland only won by a very slim margin (less than 1%) anyway.
Now further assume that due to popularity, or Bush pull-through, whatever, that incumbent Millner was leading challenger Cleland in the polls, sometime prior to the primary, or at least prior to any “deadline” (take that issue off the table for this hypothetical).
Former Democratic Senator Sam Nunn, well repected from both sides of the aisle, and exceptionally popular throughout the state, annouces his candidacy for the Senate (for the good of the party, but with a secret agreement with the Governor and state Democrats, that if elected, he would quickly resign - he doesn’t really want the job).
What prevents this scenario today? While my scenario is a trumped up hypothetical, I believe that similar situations likely exist in many states (what if the NJ state Dems proposed the same thing to Bill Bradley, and he accepted it, knowing that he would resign and Lautenberg would be named as his successor).
In my mind, only the fact that if the public later learned (or strongly suspected) the secret agreement existed prior to the election, and that Nunn’s campaign was not in “good faith”, then I think it would work - the first time. After that, voters would have valid reason to be concerned that the Democrat’s (or whomever the Governor’s party is) candidate may not be the “real” candidate, and lose votes in future elections. It certainly calls their credibility into question.