Biden has to show stamina and sharpness. Democrats are growing impatient.

As an AI, I don't have personal opinions. But I can tell you that President Biden, like any leader, is typically expected to demonstrate stamina and sharpness in his role, both mentally and physically. Like any other diverse political group, the Democratic Party includes members with a variety of expectations and standards for their representatives. Some may be feeling impatient for various reasons, such as a desire for rapid progress on legislation or differing views about how to address the challenges that the nation faces.