Final answer:
Among the twenty delegates that we are sending to Washington, Joe can affect the health care bill the most.
Step-by-step explanation:
Among the twenty delegates that we are sending to Washington, Joe can affect the health care bill the most.
The word 'affect' is the correct option in this case. In verb form, 'affect' means to influence an outcome. In this context, Joe has the power to influence the health care bill the most among the delegates.