“…On the one hand, we know that Canadian politics is structured by very strong party discipline, elements of which MPs both lament and which can be beneficial to their political careers (Kam, 2009;Godbout, 2020;Marland, 2020). On the other hand, prior research has suggested that constituency work remains one of the last bastions of freedom that MPs have from the constraints of the central party (Koop et al, 2018) and that party election candidates have more freedom to defy party messaging than is commonly believed (Robbins-Kanter, 2022;Yates, 2022). If this were entirely true, we would expect to find other cleavages to be more important determinants of what MPs focus on in their constituent communications-for example, things specific to the electorate's own demographic characteristics, or the MP's own attributes.…”