Congressman Mark Kirk is relying on secret money raised by undisclosed corporate donors and a visit by an out-of-state politician to save his campaign, while Alexi Giannoulias rallies voters with hometown hero, U.S. President Barack Obama.

CHICAGO -- U.S. Senator John Kerry joined Alexi Giannoulias’ U.S. Senate bid today, lauding his clean energy agenda, but he also warned of the corporate special interests trying to influence the race.

“Alexi wants to see America move to a clean energy economy that will save our environment and create jobs, grow our economy and strengthen our national security so we invest in American technology rather than send billions to the Middle East,” Kerry said. “We need leaders like Alexi in Washington who will stand up to the big special interests that are determined to derail a strong clean energy bill and do the bidding of the status quo. We can’t let that happen.”

Today, Senator John Kerry joined Alexi in calling out the shadowy groups that are trying to buy this election. Here's what Senator Kerry had to say: