Politics

An alleged case of ballot tampering in Oregon’s Clackamas County has implications for races statewide. Officials say a volunteer elections worker is suspected of marking votes for Republicans in races a voter had left blank.

Clackamas County is considered a key swing area in statewide races in Oregon. It's also home to several hotly contested legislative districts that could determine the balance of power in the Oregon House.

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A quick head's up on what this is. The Battleground is an aggregation of NPR member stations' content produced during election night. It's curated by the staff at NPR Digital Services, including Eric Athas, Teresa Gorman, Will Snyder, Kim Perry and Erin Teare Martin. The list of participating stations and states is posted at the bottom.

(Revised at 5:46 pm ET)

On the final day of the 2012 campaign for the White House, President Obama and Mitt Romney are making the last push for votes in states each believes critical to achieving the 270 Electoral College votes needed for victory.

Obama was scheduled to campaign in three swing states, while Romney had events planned in four. The only overlap was in Ohio, considered the linchpin of the election.

As Eyder said earlier, "it's almost over."

The campaign, that is.

But if you haven't had enough of it all yet, here's are three places to go if you're looking for tips on what to watch for and when to watch for it.