Biden’s July 4th party kicks off events that may reassure Democrats

If United States President Joe Biden is going to survive pressure to abandon his re-election campaign after a poor showing in his debate with Donald Trump, he needs to ace a gauntlet of events in the coming days.

As calls grow from some of his own Democrats to step aside, and support coalesces around the idea of Vice President Kamala Harris taking his place in the November election, Biden needs to demonstrate stamina and mental acuity to voters and donors.

Biden will host families...