NEW YORK ( TheStreet) -- Super PACs already have disbursed millions for Super Tuesday spending sprees since the Michigan primary. Restore Our Future, which supports Mitt Romney, on Wednesday spent about $1.2 million, while Winning Our Future, which backs Newt Gingrich, spent $2.2 million. Red, White and Blue Fund for Rick Santorum dropped $257,061 on Thursday.
The four main super PACs supporting the Republican presidential hopefuls spent a total of $3,623,151 across two days. The figures, compiled by opensecrets.org, show that Winning Our Future's Wednesday expenditures were all in support of Gingrich, while Restore Our Future spent almost entirely against Santorum. Attacks against Romney's opponents have been a primary expenditure by Restore Our Future since the candidate lost South Carolina to Gingrich. Santorum's campaign has consistently slammed Romney about his negative campaigning, which was the former Massachusetts governor's strategy in Florida against Gingrich and in Michigan against Santorum. Romney won the popular vote in both of those state primaries. Romney isn't allowed to communicate or collude with Restore Our Future, but many of the negative dollars spent to help his campaign have also come off previous Romney losses (in Florida after a South Carolina loss to Gingrich and in Michigan after Colorado, Minnesota and Missouri losses). In this case, fresh off Tuesday victories in Michigan and Arizona, the super PAC has likely poured a lot of that negative money into Ohio as Santorum leads Romney in the major state polls. Ohio could prove the most pivotal race on Super Tuesday as it has 66 delegates at stake and as the state may play a crucial swing contest in the general election. Since Tuesday's primaries, super PAC Endorse Liberty, which backs Ron Paul, has spent $53. It was one payment through PayPal for fees. -- Written by Joe Deaux in New York. >Contact by Email. >Follow Joe Deaux on Twitter. Subscribe on Facebook.