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Rep. Paul Ryan told his colleagues he would run to be the next House speaker, but only if the major House Republican factions unite behind his candidacy and agree to a set of conditions he outlined Tuesday night.

"Basically I made a few requests for what I think is necessary and I asked to hear back from my colleagues by the end of the week," the Wisconsin Republican said following a closed-door meeting with the House GOP. "If I can truly be a unifying leader, I will gladly serve."

Ryan made the announcement following days of speculation about whether he would run after he repeatedly declined requests from lawmakers, including House Speaker John Boehner, that he seek the gavel. Ryan said Tuesday night he reconsidered the decision "with reluctance," citing concerns about the impact on his young family.

Ryan met privately with House Republicans to discuss the conditions they must agree to in order for him to run to succeed Boehner, who is planning to step down Oct. 30. Ryan said he'd give lawmakers until Friday to think over his offer. Then, he is expected to assess where the caucuses stand, and make his decision.

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