President Joe Biden’s news conference at the NATO summit amounts to a make-or-break moment in his quest to quiet a drumbeat of concerns at home and abroad about his 2024 presidential campaign. Biden was dealt fresh blows Thursday, as the New York Times reported that some of the president’s advisers had discussed ways to persuade him to step down as the nominee and that his campaign was polling voters on a hypothetical head-to-head matchup between Donald Trump and Vice President Kamala Harris. Those developments will only intensify persistent doubts from party members about his ability to defeat Trump in November and serve another four years, despite a weeks-long effort to shore up support. Biden’s top political advisers are headed to Capitol Hill Thursday afternoon before the president’s remarks, a bid to calm senators who have spent recent days all but pushing Biden to consider dropping out of the race. The Biden campaign released a cheery memo downplaying polls showing him trailing Trump, calling the contest “a margin-of-error race” in battleground states and saying there is “no indication” another Democrat would run better against the Republican. Ultimately, Biden will need to dramatically turn around perceptions when he steps before the assembled media at the conclusion of the NATO summit.