The New York Times Editorial Board argued in a Friday column that President Joe Biden's debate performance on Thursday showed voters that the president is not fit for a second term.Jim Watson/Pool/AFP via Getty ImagesPresident Joe Biden had a disastrous debate night against Donald Trump on Thursday.The president, 81, coughed, stumbled upon his words, and didn't complete some sentences.His performance did little to convince voters that he's fit for office, The New York Times Editorial Board wrote.After President Joe Biden's disastrous debate performance on Thursday night against former President Donald Trump, The New York Times Editorial Board has declared that it's seen enough: Biden should step aside.The Times editorial board, which provides opinions on critical issues facing the country at the moment, published a column on Friday criticizing Biden's performance and wrote that it did little to convince American voters that the 81-year-old president is fit for another term."The president appeared on Thursday night as the shadow of a great public servant," the editorial board wrote.