* Rep. Nancy Pelosi, Sen. Harry Reid or both will leave the Democratic leadership by the end of 2012. Speaker John Boehner and Senator Mitch McConnell will continue directing the GOP in their respective chambers.

• This will be the fourth presidential election in a row in which turnout increases. This has happened just once since 1828, from 1928 through 1940.

• In 2008, voters told the Pew Poll that they got more election information from the Internet than from daily newspapers. Next year, that advantage will grow as the Internet closes in on television as America’s principal source of campaign news.