PHILADELPHIA (AP) — His party may be enraged by Donald Trump's presidency, but Democratic presidential candidate Joe Biden insisted Saturday that Democrats will not defeat the Republican president if they pick an angry nominee.

Facing thousands of voters in his native Pennsylvania for the second time as a 2020 contender, the former vice president offered a call for bipartisan unity that seemed far more aimed at a general election audience than the fiery Democratic activists most active in the presidential primary process. He acknowledged, however, that some believe Democrats should nominate a...