(Update: It seems you can use this to detect electoral fraud)
2004 election
https://trends.google.com/trends/explore?date=2004-06-01%202005-06-01&geo=US&q=Kerry,Bush
2008 election:
https://trends.google.com/trends/explore?date=2008-07-24%202008-12-24&geo=US&q=Obama,%2Fm%2F0bymv
2012 election:
https://trends.google.com/trends/explore?date=2012-07-24%202012-12-24&geo=US&q=Obama,%2Fm%2F0271_s
2016 election:
https://trends.google.com/trends/explore?date=2016-07-24%202016-12-24&geo=US&q=clinton,Trump
2020 election: (past 90 days)
https://trends.google.com/trends/explore?date=today%203-m&geo=US&q=Biden,Trump
Note: 2008 was an overwhelming win for Obama
The last 2 elections were very tight
the coming election looks like a total red tsunami.
Someone else noticed this, 3 years ago!
Marjory Taylor Green VS John Cowan
Brian Kemp vs Stacy Abrams
Klobuchar vs Jim Newberger. (2018)
Seems to work even for senate elections
Republican Mark Harris VS Robert Pittenger
Note: Harris was accused of election fraud ..yet google shows him winning in a landslide!
h/t JADR