(Bloomberg) -- The selloff in risk assets accelerated amid mounting concern over the debt-ceiling impasse in Washington, with stocks suffering their worst rout since May.Most Read from BloombergThe Country That Makes Breakfast for the World Is Plagued by Fire, Frost and DroughtHSBC Bets Big on China as Pressure Mounts in LondonHow Los Angeles Became the City of DingbatsWhy the Gaza Strip May Be the City of the FutureThe Rise of the Pandemic DashboardDuring a Senate hearing Tuesday, Federal Reser