The next US democratic debate has been all but confirmed to be a showdown between Senator Bernie Sanders and Former Vice President Joe Biden.
The pair make up the final three candidates, after Senator Elizabeth Warren dropped out the race.
Hawaii representative Tulsi Gabbard is still running her campaign, but doesn't make debate qualifications after dismal national polling numbers.
The two front runners will face off in Phoenix on March 15.
The former Vice President is leading the delegate count after a shock comeback on Super Tuesday - 652 delegates pledged to support him compared with 573 for Bernie Sanders.
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