Not being Obama is not enogh.
It happens that among the actual panel, I think that the best qualified to beat Obama is Newt Gingrich.
He has the fighting spirit to trash Obama and tear any of his arguments to pieces, he has the experience how to reform the government and administration, he has the best economic plan to redress America, and he is probably the only one he isn't running for personal glory, but because he profoundly thinks that the Republic is in lethal danger. This is Reagan's legacy in Newt's mind.
As he himself said, he was driven back to politics by the Supreme Court decision that "In God we trust" is "unconstitutional". He counts to fight against anyone who tries to pervert the Constitution.
He made mistakes in his 50-year-long presence in American politics, but WHO hasn't? However, there is a chasm between Newt and the other contenders. No one can hold him a candle as far as intelligence, knowledge and experience are concerned. I've made a through research into his acts, writings and "Contract for America 21st century" before I came to this conclusion.
Newt was criss-crossing the country, supporting the Republican candidates and inflaming the enthusiasm of Republican base, explaining the importance to stop Obama destroying America.
http://youtu.be/ESG9IrOjX7c
In 2009 already: NEWT GINGRICH - Clueless Obama "Dangerously Confused" About America's Enemies
http://youtu.be/E8Z5MOa5YmA