WASHINGTON — A state judge has refused to block a new Pennsylvania law that requires voters to display a current government-issued photo identification at the polls, upholding a Republican-backed measure that Democrats say may prevent tens of thousands of low-income and elderly voters from casting ballots.

Read more in the Los Angeles Times: http://www.latimes.com/news/nationworld/nation/la-na-pa-voter-id-20120816,0,2346712.story