AP Interview: Biden undeterred by rival Warren’s ascendancy

Democratic presidential candidate, former Vice President Joe Biden speaks at a town hall on Saturday in Florence, S.C. (AP Photo/Meg Kinnard)

FLORENCE, S.C. — Joe Biden said Saturday he is undeterred by the ascendancy of Democratic rival Elizabeth Warren, noting that some of his supporters are already treating the primary campaign as a general election contest between him and President Donald Trump.