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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 RyanPaul RyanHealthcare spending: the elephant in the tax reform room Overnight Healthcare: Latest on Senate healthcare bill | Four conservatives say they'll oppose | Obama slams bill | Health groups offer scathing criticism As Congress debates repeal of the estate tax, why not consider ending the gift tax? MORE 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 ObamaBarack ObamaOvernight Healthcare: Latest on Senate healthcare bill | Four conservatives say they'll oppose | Obama slams bill | Health groups offer scathing criticism Obama slams 'fundamental meanness' of Senate healthcare bill Obama WH ethics lawyer: Lack of Comey tapes example of 'witness intimidation' MORE
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