Biden faces the most consequential weekend of his presidential rematch with Trump

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As he frantically fights to salvage his campaign following last week's disastrous debate performance, the next couple of days may determine if President Biden can survive or fall victim to a rising tide of calls from within his own party to end his re-election bid.

The tests for the 81-year-old president begin on Friday, as he aims to prove that he has the fortitude to defeat former President Trump in their 2024 election rematch.

First up is a rally Friday afternoon in battleground Wisconsin, which will be followed by a sit-down interview with ABC News that will run in prime time on network television. On Sunday, the president and First Lady Jill Biden appear in Pennsylvania, another key swing state he needs to carry to win re-election.

Through it all, the oldest president in the nation's history will need to show Americans that he still has the stamina and acuity to handle the toughest and most demanding job in the world.

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It's a test Biden decidedly failed last week in Atlanta, Georgia, after his halting delivery and stumbling answers during the debate with Trump sparked widespread panic in the Democratic Party and spurred calls from political pundits, editorial writers and some party donors for Biden to step aside as the party's 2024 standard-bearer.

This week, three House Democrats publicly