Former Massachusetts Gov. Mitt Romney's six primary wins on Super Tuesday didn't come cheap. An NPR analysis shows that last week alone, the Romney campaign and the pro-Romney superPAC combined spent nearly $7 million on TV ads.
Less than $1 million of that was spent by Romney's official campaign, while the pro-Romney superPAC Restore Our Future — which has almost exclusively engaged in negative advertising this year — spent $5.7 million.
That's compared to $220,000 spent on ads last week by the superPAC supporting former Pennsylvania Sen. Rick Santorum.