In total, the candidates in the 2008 presidential election spent just over $1 billion on their campaigns. Just four years ago, President Obama raised $750 million, primarily via small donations from grassroots supporters. But the landscape looks pretty different in 2012: that amount will be surpassed by just a handful of GOP patrons and super PACs alone.

Made possible by the Supreme Court’s decision in Citizens United, dark money organizations like Restore Our Future and American Crossroads will raise and spend virtually unlimited amounts to prop up Mitt Romney and the rest of the Republican ticket. Politico notes that American Crossroads and the affiliated Crossroads GPS, a Karl Rove brainchild, is expected to spend up to $300 million. That’s almost as much as John McCain spent on his entire 2008 run.

The bulk of campaign expenditures go to advertising – and $1 billion certainly buys a lot of airtime. Thanks to Citizens United, this elite group of financiers can buy the loudest, most far-reaching voice in the 2012 elections. The amount collected by Super PACs and 501 c(4)s dramatically dwarfs traditional party and direct-campaign fundraising, which is the mechanism by which the grassroots are able to contribute to the process. The contrast is stark:

Restore Our Future, the pro-Romney super PAC, spent twice as much on the air as the campaign did in the thick of the primaries: Through March, the campaign had put $16.7 million into TV, while ROF shelled out $33.2 million.

In Florida, the super PAC outspent the campaign, $8.8 million to $6.7 million. (The campaign can get more spots per dollar because of more favorable rates.) In Michigan, it was $2.3 million to $1.5 million. In Ohio, ROF outspent the campaign, $2.3 million to $1.5 million.

The Citizens United decision has granted the 0.01% more leeway to try to buy our democracy than ever before. The sheer numbers make the need for constitutional remedies to overturn that decision and restore the balance of influence in our elections to everyday Americans is more apparent than ever.