Publication Type: Conference Paper/Unpublished Manuscript Abstract: Why do ethnic diasporas in the United States differ in their readiness for political mobilization on behalf of homeland interests? Using three Middle Eastern heritage groups in the United States, this study develops a tiered model of politicized ethnic identity emphasizing both individual-level traits and group/collective properties. Empirical analysis confirms that individuals differ in their readiness for mobilization based on the strength of ties to the ethnic community and, net of such differences, each group varies based on the contexts of exit and reception it faced at the time of immigration.