Investor funds drive against Tennessee Republican: “Nearly three dozen super PACs that have raised at least $100,000 in the 2012 election have five or fewer donors, a USA TODAY analysis shows. Nearly a third of all contributions to the pro-Mitt Romney super PAC Restore Our Future — the super PAC that has raised the most money — have come in chunks of least $1 million each. Campaign-finance experts say super PACs’ greatest influence may be felt in House contests. In 2010, the average winner of a House race spent $1.4 million — a tiny fraction of the $730 million President Obama spent to win the White House two years earlier, according to data compiled by the non-partisan Center for Responsive Politics. ‘In a congressional race, if someone comes in with $100,000 or $200,000 in well-placed television ads, they can have a real impact,’ said Bill Allison of the Sunlight Foundation, a non-profit group tracking outside political spending. ‘One or two people can really sink a campaign.'”

Indeed, I’ve been saying for a while that the impact of federal Super PACs, both electorally and legislatively, will be much more on House and Senate races than on the presidency.