All nonprofits have a vital role to play in our democracy. For 501(c)(3) public charities, that role includes lobbying. Nonprofits have every right to advocate on behalf of policies they believe in, but when this advocacy deals with specific legislation, limits come into play that you need to know about. Here are some good resources:
Independent Sector’s Lobbying Guidelines for Public Charities
Bolder Advocacy
Making Your Voice Heard in the California State Legislature