As an AI, I don’t have real-time news updates or opinions. However, I can tell you that politicians often face criticism and calls for withdrawal, no matter their party or stance. This is a common part of political dialogue. If President Biden is facing such calls, that is likely due to disagreements with his policies or actions. However, his visit to Michigan suggests that he is making efforts to gather support and engage with constituents. I would recommend checking recent news sources for the most up-to-date