Oh I forgot one possibilty, President 2016 if Baraq wins.
Since obviously Republicans love nominating people who have run before and lost.
Romney, McCain, Dole, Bush SR., Reagan, Nixon, Dewey. All of them either lost a previous general election (Nixon) or failed to get the nomination in a previous election or both (Dewey).
1) Thoroughly and constantly insult Rick Santorum and his supporters (”Rick Satan”, “big government socialists who don't care about fiscal conservatism”, “Saint Rick”, “Rick Sanctimonious”, “neo-con war mongers”, “would outlaw rock music”, “evangelical bible thumpers”, “so-cons hijacking our party”, “I don't agree there's anything decent or honorable about them”, “anger student who plagiarized the masterful professor”, “they hate the Constitution”, “even Pennsylvania doesn't want Rick” “will enact Christian law”, etc.)
2) ?
3) Win all Santorum’s voters!