Pollster Adam Carlson said he thinks New York City's mayoral race candidate Zohran Mamdani could win 1 million votes on Election Day.

Poll watchers were tasked with identifying ineligible voters, duplicate voting, or ballot tampering. In some states, watchers could challenge a voter’s eligibility, triggering additional verification.

NBC News Chief Data Analyst Steve Kornacki joins Meet the Press to break down a new NBC News poll revealing where both ...