US President Joe Biden has taken full responsibility for his poor debate performance against Republican rival Donald Trump last week, saying his disastrous showing was “nobody’s fault but mine.” In his first televised interview since the debate, Biden told ABC News that he had a “bad night” that evening, but that there was “no indication of any serious condition.” Pressure on Biden to step aside as the Democrats’ 2024 presidential candidate has been growing from within his own ranks since he faced off against Trump at a 90-minute televised debate on June 27. During the showdown, a raspy-voiced…