The candidates for Ohioâs contested U.S. Senate seat only recently started airing TV ads in the last two weeks. But the outside campaigns for and against the incumbent and the challenger have been going on for a while. Ohioâs Senate contest was long predicted to be one that would get a lot of national interest from super PACs â the political action committees that canât directly coordinate with the candidates but can raise and spent unlimited amounts of money for and against candidates. And Super PACs have been targeting Sen. Sherrod Brown for a while. There was this ad last summer from Karl Roveâs group Crossroads GPS. "Instead of fixing our economy, politicians like Sherrod Brown voted for billions in new taxes...." There was this ad in December paid for by the US Chamber of Commerce. http://www.youtube.com/watch?v=DqcXum8uKYE And then there was an ad from October starring 1950s pop singer Pat Boone, targeting a particular and active voting bloc. "Medicare will be bankrupt in nine years, but Washington politicians like Sherrod Brown are ignoring the problem, putting their own re-elections first...," Boone said during the ad. Sadie Weiner is the press secretary for Sherrod Brownâs re-election campaign, and notes ad watchers have found factual errors and other problems with some super PAC ads. "These outside special interest groups have been on the air for more than a year, spending $5 million on ads attacking Sherrod and lying about his record. And thatâs more outside spending than any candidate in the country has faced," Weiner says. Weiner notes ad watchers have found factual errors and other problems with some super PAC ads. So far, there have been no Super PAC ads focused on Brownâs Republican challenger, treasurer Josh Mandel. Brown is a first-term US Senator, but heâs been in elected office for 38 years. While Mandel holds statewide office now, heâs only been running for office since 2003. Travis Ridout is with the Wesleyan Media Project in Connecticut, which tracks political ads across the country. He notes Brown is fairly well known on both sides of the political fence, while Mandel isnât. "Itâs more difficult to shape peopleâs impressions of an incumbent senator whoâs been around for a long time, about whom people have already informed or developed impressions, than it is someone whoâs new to the political game," Ridout says. But just because Mandel hasnât been the star of any Super PAC ads against him, it doesnât mean his campaign isnât concerned about Super PAC spending. This March ad comes from the League of Conservative Voters. "When it comes to creating Ohio jobs, no one fights harder than Sen. Sherrod Brown...." Travis Consodine is the communications director for Mandelâs US Senate campaign. "The special interests in DC and radical environmental groups have already spent $600,000 running ads for Sherrod Brown," Condosine says. Brownâs people say they figure thereâs a 10 to one difference between the spending by right-leaning super PACs and those on the left. Ridout says the spending numbers may not be as big or as far apart in other states, but that seems to be the case across the country. "PACs that have been more active on the Republican side definitely have spent more money this time around so far â not to say that Democratic leaning ones wonât be putting millions and millions of dollars into ads as well." And Ridout says itâs to be expected that super PACs will spend more in Ohio than Mandel and Brown will â and that may also be the case in other states as well.