Existing research on trade politics and business activism primarily treats workers as voters. Yet employees are also stakeholders and internal advocates who shape firms’ political activities. How do employee preferences aggregate into political demands within firms? I test this question in a survey experiment with 1,732 employed U.S. adults who evaluated a petition defending either H-1B or American workers. The petitions received similar aggregate support and signing but attracted employees with different trade beliefs: each one-category increase in the belief that tariffs benefit the U.S. economy increased support for the American-worker petition by 5.1 percentage points and decreased support for the H-1B petition by 7.4 points. Among supporters, each one-unit increase in consumer nationalism was associated with a 6.1-point greater probability of not signing, similarly across petition positions and most strongly for American-made technology. Randomized information about personal stakes and objective material exposure did not systematically moderate these relationships. These findings advance the micro-foundations of corporate political activism by showing how employees’ political beliefs shape both the positions they support and whether that support becomes visible to management.