Gene Sperling, President Joe Biden's top economic advisor, resigned on Monday to join Vice President Kamala Harris' presidential campaign amid a significant downturn in the stock market, with the Dow dropping over 900 points. The resignation has raised concerns about its timing against the backdrop of fears of a US recession and a global market sell-off, with notable declines in Japan and Taiwan. Biden praised Sperling for his leadership in implementing the American Rescue Plan, which he claims has provided vital economic relief and helped reduce child poverty, though critics argue it contributed to rising inflation. The administration has faced increasing scrutiny over economic performance, especially as inflation remains high and unemployment recently rose to 4%. As Sperling transitions to the Harris campaign, the political implications of his departure could complicate the Democratic campaign narrative surrounding 'Bidenomics'. The uncertain economic landscape poses challenges for Harris as she prepares to face Donald Trump in the upcoming election.