1. Haley Barbour: Barbour's Republican Governors Association has become the story of the 2010 midterms. The RGA's second quarter fundraising numbers -- $19 million raised, $40 million on hand -- is an eye-popping total that should remind those who have forgotten about Barbour's reach in the GOP donor community. With Republicans poised to make significant gains at the gubernatorial level this fall, Barbour will almost certainly emerge with momentum after the November elections -- momentum that he may seek to channel into a presidential exploratory bid. 2. Mitt Romney: The former Massachusetts governor is slowly and methodically rolling out endorsements...