Unlike Tom Carper, I can see John Carney attracting a primary challenger.
1) He is not well liked. Even within the party, he is viewed as a “Ruth Ann Minner: Part Duh” (c) 2017.
2) The Gov’s race cost much less to file for.
3) His retrograde economics give him the appearance of being at war with the Dem base. That is going to get more obvious as he rams through tax cuts and services cuts with the help of the DEGOP.
4) He could easily give up the Governorship to Ken Simpler. If he limps into 2018 with zero accomplishments (other than tax cuts for the very wealthy and service cuts for everyone else) he will be a very weak ticket-topper. Aint nobody got time for that.
5) His base is wealthy (the chamber of commerce), but small. He’d be beatable in a primary where money isn’t as big a factor (just ask Mike Castle).
6) Dems are fired up to want to vote for authentic Dems. Carney views himself as a post-partisan, 1980’s style DLC type Dem. If that shit wasn’t out of fashion two months ago, it sure as hell is now.