 He's done virtually nothing. The president speaking at the close of the NATO summit in Washington this evening, he once again reiterated he's not stepping away from his reelection bid. This is the Biden campaign aims to reassure several Democrats the president is fit for another four years in office. In a memo obtained by Fox News, campaign officials say they have not seen a drastic shift in vote share since last month's poor debate performance and insist it remains a margin of error race in the key battleground states.