How do levels of cognitive household labor -- the ``mental load'' involved in anticipating, fulfilling, and monitoring household needs -- affect political engagement? The mental load is distinct from the physical tasks of e.g., cooking and cleaning, and thought to be disproportionately undertaken by women. Thus far, the few studies addressing the issue have used qualitative methods to document it, and the topic has yet to be studied in political science research. As a result, we may be underestimating household gender gaps and their impact on politics.