Sen. Rand Paul, R-Ky., center, meets with members of the Londonderry Fish and Game Club in Litchfield, N.H., on Jan. 14. Paul was one of three GOP presidential hopefuls who attended Sunday's semiannual gathering of David and Charles Koch's donor network in California. Jim Cole/AP hide caption

itoggle caption Jim Cole/AP

Congressional Republicans have "been given a second chance by the American people," AFP President Tim Phillips said. "And we're going to hold them accountable. We're determined about that." Phelan M. Ebenhack/AP hide caption

itoggle caption Phelan M. Ebenhack/AP

President Obama walks to the podium at his 2008 nominating convention. Lawmakers are inserting into the spending bill a provision allowing political parties to collect up to $97,200 from each donor to pay for their conventions. Chuck Kennedy,Scott Andrews/AP hide caption

itoggle caption Chuck Kennedy,Scott Andrews/AP