Former presidential candidate Hillary Clinton will endorse the campaign Joe Biden (File)
Former presidential candidate Hillary Clinton will endorse the campaign of her fellow Democrat Joe Biden on Tuesday, according to a person familiar with her plans.
The endorsement, set to take place at a 3 p.m. briefing online, marks the latest in a series of high-profile Democrats lining up behind Biden ahead of what is expected to be a tight election contest against Republican President Donald Trump.
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