BuzzFeed first reported Steel would join the Romney campaign, and a Romney aide confirmed the move. 

As BoehnerJohn BoehnerLobbyists bounce back under Trump Business groups silent on Trump's Ex-Im nominee Chaffetz won't run for reelection MORE’s spokesman, Steel is well acquainted with the budgets spearheaded by Ryan, the House Budget Committee chairman. 

Ryan’s budget framework, which includes a broad overhaul of Medicare that Democrats believe can be a political plus for them, is expected to be central to the discussion for the rest of the campaign.