House Budget Committee Chairman Paul Ryan, R-Wis. (right), accompanied by House Speaker John Boehner of Ohio, takes reporters' questions during a Dec. 11 news conference. J. Scott Applewhite/AP hide caption

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House Speaker John Boehner leaves a news conference Thursday, after criticizing conservative groups that he said held too much sway in Republican politics, "pushing our members in places where they don't want to be." J. Scott Applewhite/AP hide caption

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House Budget Committee Chairman Paul Ryan, R-Wis., left, and Senate Budget Committee Chairwoman Patty Murray, D-Wash., walk to announce a tentative agreement Tuesday between Republican and Democratic negotiators on a government spending plan. J. Scott Applewhite/AP hide caption

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Rep. Paul Ryan, R-Wis., offered a path forward in the fiscal stalemate, but Tea Party hard-liners weren't impressed. Mark Wilson/Getty Images hide caption

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Vice President Joe Biden speaks as Republican Rep. Paul Ryan and moderator Martha Raddatz listen during the vice presidential debate at Centre College on Thursday in Danville, Ky. Michael Reynolds/Pool/Getty Images hide caption

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Tonight's faceoff between Vice President Joe Biden (right) and GOP Rep. Paul Ryan of Wisconsin will likely be an important stage-setter for next week's second presidential debate. Jose Luis Magana/Thanassis Stavrakis/AP hide caption

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