"A big part of that drop-off is that volunteer groups have stopped doing third-party registration. Third-party registration is when organizations send people into the community carrying clipboards to sign up voters. ... The League of Women Voters used to do it. So did political parties and student groups. Now, hardly anyone does it."

URL: 
http://www.news-journalonline.com/columns/footnote/2012/03/30/new-law-discouraging-new-voter-sign-ups.html