Final answer:
The number of days that a staff/clinic has to mail off completed voter registration cards varies from state to state, with some states requiring registration at least 30 days before an election and others allowing for same-day registration.
Step-by-step explanation:
The number of days that a staff/clinic has to mail off completed voter registration cards varies from state to state. In many states, voter registration must take place at least 30 days before the election. However, there are some states that allow for same-day registration. Each state has its own specific rules and regulations regarding voter registration deadlines and procedures. It is important to check the specific requirements of your state to determine the exact number of days the staff/clinic has to mail off completed voter registration cards.