We live in an increasingly globalized world in which nearly 300 million people---around 3.5% of the world population---lives in a different country from the place of their birth. As the size of this population continues to grow, its impact on the politics of both the countries of origin and destination remains a crucial area of inquiry in the 21st Century. While scholars have recently devoted considerable attention to questions of why governments extend voting rights to citizens abroad, little to no work has investigated (a) whether expatriate votes actually matter and, perhaps more importantly, (b) how differently do expatriates behave politically than their countrymen whom they left behind? In this paper, we leverage the Lebanese government's decision to allow expatriates to vote from abroad in 2022 parliamentary elections to address these questions. Since Lebanon's electoral system conducts elections in localized geographic districts, requires expatriates to vote in those districts (as if they still lived there), and disaggregates expatriate votes at the district level by the countries in which they are voting from, we have a unique data set to explore these questions. The answers to them are quite stark. In Lebanon's 2022 elections, expatriates were able to shift the outcome of around 10 out of 128 parliamentary seats. Moreover, Lebanese expatriate voters were much more likely to vote like other Lebanese in their new locales than those who remained behind.