Holy carp! You’re right. I had forgotten that. He ‘suspended campaigning’ in October 2008, to go visit. Then she died.
https://www.reuters.com/article/us-usa-politics-obama-idUSTRE49K07G20081021
And we know he NEVER stopped campaigning. Lots of photo ops, getting the old people vote, etc.
He visited her in August. Then she got sick. He went back in November and she died 9 days later. Did he go back to finish the job? The election was the day after she died. He certainly got some sympathy votes and all his secrets died with her.
/Tin Foil