The Republican-controlled Senate approved the legislation last week. Gov. Tom Corbett expressed his support this week. And the House of Representatives has been debating it since Monday.
York County residents have taken sides, too.
The state House debated the issue for more than six hours. Voters from across Pennsylvania followed along.
The debate wasn't just happening in Pennsylvania. This week, a Wisconsin judge ruled that a similar law there was unconstitutional, and the U.S. Department of Justice rejected a voter ID measure in Texas.