From the "bleedin' obvious" department:
What did Trump start tweeting horse pucky about "delaying elections"?
Here is the reason:
https://www.wsj.com/articles/us-economy-gdp-report-second-quarter-coronavirus-11596061406
U.S. Economy Contracted at Record Rate Last Quarter; Jobless Claims Rise to 1.43 Million
If everybody is talking about "delaying the election", no one is talking about a 33% drop in GDP, and the primary thing Trump planned to campaign on was the economy.