Yeah. Renominating Fung wasn’t a smart idea by the RIGOP. 1) Rematches never really work out 2) Raimondo enjoys incumbency advantage this election 3) This midterm is poised to be very Dem-friendly.
Ehh, they can. However, for them to work out, both candidates need to have obtained Incumbency from a previous period. Examples being Dold v Schneider, Shea-Porter v Guinta. Both candidates in these situations can claim to be the true incumbent. In situations where its a loser rematching after just losses, well...s/he just looks pathetic.
Those are still the exception, rather than the rule. More often than not, defeated incumbents that try to come back end up failing (Russ Feingold, Bob Ehrlich, Pete Gallego, Roy Barnes).