(FILES) In this file photo taken on October 13, 2018 US Senator Elizabeth Warren (D-MA) addresses a town hall meeting in Roxbury, Massachusetts. - Democratic Senator Elizabeth Warren -- a fierce critic of Donald Trump -- on December 31, 2018 took a major step towards a likely run for president, seeking to upset the incumbent Republican in 2020. The 69-year-old Warren, who has represented Massachusetts in the Senate since 2013, is a progressive Democrat. She said she was launching an exploratory committee for president, which would help her raise funds early in the campaign cycle. (Photo by Joseph PREZIOSO / AFP)
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