One of the things that all of these posts are missing is the acknowledgement that there is a tremendous difference between campaigning for President and being President. Running for President requires appeal to a limited constituency; being President requires appeal to quite an expanded constituency. Romney and all of the Republican candidates are pursuing party delegate votes, something President Obama doesn't have to do.

"Generosity. That was my first mistake."
"Experience must be our only guide; reason may mislead us."
"Instagram is Twitter for people who can't read."