Yes, indeed!!! Both LONGTIME Senator Bill Nelson (for re-election) and Andrew Gillum for Governor had 3%+ leads for MONTHS here in FL. Obama comes to FL, stumps heavily for the two, and what happens? BOTH LOSE!!! 
https://www.orlandosentinel.com/new...governor-election-results-20181105-story.html
https://www.nytimes.com/elections/results/florida-senate
https://www.orlandosentinel.com/new...governor-election-results-20181105-story.html
https://www.nytimes.com/elections/results/florida-senate