**Abstract:** We combine recent theoretical advances in the study of morality with a burgeoning interest in the predictive power of political orientation to test new hypotheses concerning impression formation. In two studies (total N = 3,881), the valence and extremity of newly-formed attitudes depended upon U.S. participants’ political ideology and the moral content of information used to induce the attitudes. Specifically, when forming impressions of a person violating moral foundations of Care and Fairness, political liberals disliked the person more than did conservatives. In contrast, when forming impressions of a person violating moral foundations of Loyalty, Authority, and Purity, conservatives disliked the person more than did liberals; these effects held for both general and specific moral violations. In addition, although people of both ideologies disliked a person more who committed violations of Care and Fairness compared to Loyalty, Authority, and Purity, this difference was descriptively twice as large for liberals as for conservatives. This work establishes that ideological differences are important not only for long-standing attitudes and judgments, but create attitudinal divides at the earliest stages of evaluation. This finding may help explain how new topics are so quickly and easily incorporated into the ongoing “culture war”. **Notes about available files:** - Only the cleaned datasets are provided because raw data files contain sensitive, confidential information (potentially-identifying demographic information). The SAS files show the data cleaning process (i.e., how we went from the raw data to the cleaned SPSS files). If you'd like the raw data files and have IRB approval, we are more than happy to share them. - The experiment files were used to run the studies on the Project Implicit website. These can be used as a codebook to understand what items are available in the dataset. Use any text editor to open them (notepad, notepad++, komodo edit, Word; generally you would save the file, right click on it, and choose "open with" your preferred text editor).