NBC: “With the $37 million being spent this week on political advertising — including the campaigns and the Super PACs that support them — the grand total for this campaign is now more than $512 million, about the amount spent on advertising in the entire 2008 general election, according to an NBC News/Smart Media Group Delta analysis. Almost half of that money is coming from outside groups, like Super PACs — and the vast majority of the outside money is going to support presumptive Republican nominee Mitt Romney.”