@pbsnews: Newsrooms across the country, including PBS News, rely on the Associated Press on election night. Lisa Desjardins walks through how the AP makes calls on this major voting day, from calculating the "expected vote" to conducting voter surveys. Here are a few key terms to know. #pbsnewshour #pbsnews #newshour #AP #associatedpress #election #electionnight #vote #2024elections #presidentialelection #politics #electionday