Defiant Biden says won’t leave race, doesn’t need cognitive test

President Joe Biden speaks during a campaign event at Sherman Middle School, Friday in Madison, Wis. (REUTERS/Nathan Howard)

President Joe Biden speaks during a campaign event at Sherman Middle School, Friday in Madison, Wis. (REUTERS/Nathan Howard)

U.S. President Joe Biden on Friday said he did not need a cognitive test to determine whether he had a mental decline and dismissed calls from some Democrats that he should step aside to let a more vigorous candidate take on Republican Donald Trump.