How could support from members of a nursing association or union allow you make your voice heard by legislators to influence policymaking? Why is it important for others to become involved and show their support to policy makers?

Advanced practice registered nurses (APRN)

As an Advanced practice registered nurses (APRN), how could support from members of a nursing association or union allow you make your voice heard by legislators to influence policymaking? Why is it important for others to become involved and show their support to policy makers?