Obama, Romney, Ryan, Santorum are 2012's most-talked-about political figures on Facebook

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Obama also tops the list of 10 most popular political topics on Facebook during the past year. The list also includes topics such as gay marriage and ObamaCare.

Mitt Romney comes in second on both lists. The other two most-talked-about politicians this year were GOP vice presidential candidate Paul Ryan and Rick Santorum, a contender for the Republican presidential nomination. 

Wisconsin congressman Ryan appears on the lists for both politics and for public figures, competing on the latter with sports and screen stars. Vice President Biden does not appear on either list.

Facebook's list of popular political topics in 2012:

Barack Obama
Mitt Romney
Voted
Four More Years
Paul Ryan
Rick Santorum
Gay Marriage
Obamacare
The Polls
DNC

Facebook's list of public figures popular in 2012:

Barack Obama 
Mitt Romney 
One Direction 
Tim Tebow 
Eli Manning and Peyton Manning (tie) 
Madonna 
Honey Boo Boo 
Jeremy Lin 
Paul Ryan 
Phillip Phillips