President Obama revisited Reddit to ask its users to vote before polls close. 

It's the second presidential visit to the popular message board.  In August, the president answered users' questions in a thread so popular it eventually crashed the site. It's doubtful his latest visit will stir up as much traffic, though it was generating frequent comments — 350 within the first 15 minutes after it posted. Here's the message:

President Obama’s reddit AMA: Top five most awesome questions