Why do individuals defect from the partisan pull of their social identities? Previous explanations of social sorting often neglect to account for these defectors whose partisanship cannot be explained by simply tallying up their social identities. I call these individuals political heretics. To better understand this phenomenon, I leverage white evangelicals, one of the most socially and politically sorted groups in the United States, who support the Democratic Party as a case study. I find that, based upon 68 face-to-face interviews across seven churches, two explanations emerge that explain their heresy. First, some find their way into Democratic congregations that shield them from the pressure exerted by residing in a religious tradition that has undergone extensive political sorting. Second, some choose to remain in predominately Republicans churches and offset the cost of this political pressure with some other benefit. However, for those who choose the latter, electing to remain in a church where they are in the political minority, they face significant headwinds to either update their political preferences or leave. Despite these embattled defectors choosing to remain in Republican congregations, the pressure of polarization may eventually force them out.