Biden supporters bank on debate with Trump to ease age concerns

For 90 minutes on Thursday night, U.S. President Joe Biden has the chance to show doubting Americans that, at age 81, he is capable of handling the rigors of another four-year term, when he faces off in a debate against Republican Donald Trump.

A strong showing could help neutralize those concerns and focus voter attention on policy issues. A weak performance could dampen fundraising and push Trump further ahead in the polls.

Both men are under scrutiny over their age and stamina.