[cnn-photo-caption image= http://i2.cdn.turner.com/cnn/2009/POLITICS/03/05/limbaugh/art.rush.limbaugh.cspan.jpg caption="Radio host Rush Limbaugh has been vocal about his displeasure with President Obama's policies."]
(CNN) - As Democrats cast conservative talk show host Rush Limbaugh as the de facto leader of the GOP, Republicans are decrying what they see as an orchestrated scheme designed to divert attention from the Democrats' spending proposals.
Democrats fired out two political e-mails about Limbaugh on Thursday morning, calling him the face of the GOP, and Republicans sent out one of their own, demanding that the White House "come clean" about and apologize for a "political attack game."
An e-mail sent on behalf of the Democratic Senatorial Campaign Committee states: "Rush Limbaugh is the leading voice of the Republican Party. Make no mistake. When Rush says jump, congressional Republicans say how high?"
The committee says that while President Obama has reached out a hand to Republicans, the GOP has "preferred to kowtow to extremists like Limbaugh rather than accept the good faith outreach of our president."
The letter asks readers to sign the committee's petition - which will be sent to Senate Republicans - "demanding that they reject the disgraceful words of Rush Limbaugh and start working with President Obama on real solutions for the American people."
Also on Thursday, the Democratic National Committee announced in an e-mail its plans to buy billboard space in West Palm Beach, Florida, criticizing Limbaugh for opposing Obama's policies.
The DNC sent an e-mail to supporters Thursday soliciting a "slogan in ten words or less" that will appear on the billboard in Limbaugh's hometown. "If Republican leaders aren't willing to tell Rush, then we will," DNC Executive Director Jen O'Malley Dillon wrote in the e-mail.
On the Republican side, Sen. John Cornyn of Texas sent an e-mail to supporters of the National Republican Senatorial Committee asking them to sign a petition demanding that the White House apologize for not focusing on "the hard work that needs to be done to get America's economy back on track."