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As Vice President Joe Biden announced he would not run for president, he also promised the American people that his work wasn't finished yet. What will he do next?

"But while I will not be a candidate, I will not be silent," Biden vowed from the rose garden. "I intend to speak out clearly and forcefully, to influence as much as I can where we stand as a party and where we need to go as a nation."

With fifteen more months left in his vice presidency, Biden has time to advocate for the middle class, public education, limiting money in politics, ending economic inequality and furthering cancer research. The lofty goals might take longer than the rest of his term.

"There's another reason Biden may be doing this, and that's to increase his leverage in a post-Obama world," a former Biden and Clinton staffer told the Washington Examiner. "He's a very vocal guy. Would I be shocked if Hillary Clinton asked him to be Secretary of State and he said yes? No."

During a forum with Walter Mondale on Tuesday, Biden spoke of his love of foreign policy and how he saw his role as being similar to the secretary of state. He joked that the only reason he didn't take the latter job was that his wife Jill wanted to live in the vice president's residency.

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