>Our finding is in line with existing results in the literature regarding the US House elections that incumbent candidates gain less from spending, compared to their contender counterparts. This is due to diminishing returns that occur at a certain point, after which incumbent candidates can increase the winning probability only marginally (Green & Krasno, 1988). However, this finding is in contrast with other studies considering electoral systems in Brazil, Japan, or India, where spending effectiveness is equally applicable for both incumbents and contenders (Johnson, 2013; Lee, 2020; Samuels, 2001).

So yea, sorry for providing two scholarly journal articles from two different political eras that support my thesis.

I didn’t realize that this was a bad faith discussion. Now I know.