From Mike Allen of Politico.com:
FEC reports to be filed today by potential 2012 challengers to President Obama reflect a swarm of behind-the-scenes activity, with top Republicans more convinced than ever that the president is vulnerable if they can find a strong horse. Mitt Romney led the money race from April to June, raising $1.8 million for his Free and Strong America PAC, compared with SarahPAC's $866,000 and Minnesota Gov. Tim Pawlenty's $723,501.
But it's not just fund-raising: Those three also have extremely active political operations. Romney has pledged to do events this summer for the New Hampshire GOP, New Hampshire State Senate PAC and New Hampshire State House PAC. His Free and Strong America PAC has endorsed over 150 candidates this year, in Arizona, California, Connecticut, Florida, Georgia, Hawaii, Idaho, Illinois, Indiana, Iowa, Maine, Massachusetts, Michigan, Missouri, Nevada, New Mexico, New York, North Dakota, Ohio, Pennsylvania, South Carolina, South Dakota, Texas, Utah and Virginia. And the PAC's 2010 contributions to conservative candidates and causes are over $400,000.