Wikipedia:Articles for deletion/List of members of the United States House of Representatives who served a single term
this would seem to satisfy  as a relevant index and informational source. Contra the nom, the numbers of one-term Representatives are clearly quite a small fraction of the total membership of each Congress (under 4% in the one just concluding). While I don't think LISTN is helpful or necessarily relevant here, there is definitely plenty of coverage on the effect of incumbency on a politician's chances of reelection. I also disagree that this is a "cross-categorization" in the way the nom or NOTDIR suggests, because it is not intersecting something unrelated but is instead focusing on a subset of the group based on a shared fact specifically intrinsic to belonging to that group
— User:Postdlf, 18:26, 3 January 2021 (UTC)
Stance: keep
Cited policy: WP:LISTPURP (Wikipedia:Manual of Style)