Columbia, South Carolina (CNN) - "Winning Our Future," a super PAC backing Newt Gingrich's presidential bid, is set to begin running television ads Wednesday in South Carolina attacking Mitt Romney's time at the private equity firm Bain Capital.
But so far, the group hasn't entirely followed through on its threat to bombard the airwaves here with $3.4 million worth of ads.
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The super PAC has bought $1.6 million in advertising time to date, a source familiar with ad buys in the state told CNN.
Most of that is for television ads running that will run through January 16.
Meanwhile, $94,000 has been spent on radio time through primary day, January 21.
That $1.6 million figure still a hefty outlay for South Carolina, where half a million dollars can buy a campaign a strong television presence.
But it's still less than half of the $3.4 million that was promised by the super PAC to hammer Romney as a corporate predator.
"Winning Our Future" still has time to purchase more television, but with a small horde of other super PACs and presidential campaigns quickly snatching up television ad space, time is running out to buy.