If you want a place to get started learning about the issues that face working families these may be a place to start.
http://www.csmonitor.com/Commentary/David-R.-Francis/2010/0222/Workers-share-of-America-s-pie-is-shrinking
http://www.youtube.com/watch?v=ughsm9kTKn0
http://www.aflcio.org/issues/legislativealert/votes/index.cfm?termyear=2009&location=both&act=1
http://www.workingamerica.org/
http://www.npr.org/
http://www.usa.gov/Contact/Elected.shtml
http://wpr.org/index.cfm?Inter=no
http://blog.aflcio.org/
http://www.workingamerica.org/actions/callcongress.cfm
If you wonder how grass roots "Tea Party" movements get started you may have some intrest in this New Yorker article.
http://www.newyorker.com/reporting/2010/08/30/100830fa_fact_mayer