Y gwahaniaeth rhwng diwygiadau o "Etholiad arlywyddol yr Unol Daleithiau 2008"

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|next_year=[[Etholiad arlywyddol yr Unol Daleithiau, 2012|2012]]
|election_date=Tachwedd 4, 2008
|votes_for_election=Pob un o'r 538 o bleidleisiau yr'r [[Coleg Etholiadol UDA]]
|needed_votes=270
|turnout=58.2%<ref>{{cite web|url=http://www.presidency.ucsb.edu/data/turnout.php |title=Voter Turnout in Presidential Elections |website=Presidency.ucsb.edu |date= |accessdate=2016-08-18}}</ref> {{increase}} 1.5 [[percentage point|pp]] <!-- Barack Obama -->