What's a 'red' and 'blue mirage,' and how election night vote counts make it hard to tell who will win

https://www.nbcnews.com/politics/2024-election/red-blue-mirage-election-night-vote-counts-make-hard-tell-will-win-rcna175475
Stephen Pettigrew, Andrew Arenge and John Lapinski
NBC News
November 2, 2024