My knowledge of the GOP candidates is limited to the numerous gaff's I see Cain, Perry, and Bachmann committing on T.V, but so far I think the prospects are pretty grim for the Republican's this time around.
Ron Paul seems to be getting a little more positive media exposure, but is still largely alienated by the rest of his party. Also, libertarianism may be an increasingly attractive philosophy for many in the U.S, but this has surely undermined any possibility of support from big business which favours the neoliberal candidates - those who will continue to promote privatized gains and socialized losses (bailouts). In fact, any of the Tea Party candidates (no i'm not equating Ron Paul with the Tea Party) have seriously jeopardized their campaign from a financial perspective if they continue to espouse subjecting these large firms to market forces (allowing them to fail).
If I had to take a stab at how the upcoming election is going to play out, I'd say Obama will successfully deflect attacks on him regarding his handling of the recession by blaming "irresponsible banking practices". The Occupy Wall Street movement and their supporters (which are many :http://www.theatlantic.com/politics/archive/2011/10/poll-most-americans-support-occupy-wall-street-taxing-millionaires/246963/) will eat this up. The GOP will continue to produce lackluster, ideologically rigid candidates that will not be able to compete with Obama's oratory skills (not to mention his extremely well-financed campain) which will ultimately culminate in Obama's re-election.