It appears that is exactly what happened today, from Obama’s “Organizing For Action” website (now disappeared) there was this announcement:

Reality is a bitch sometimes:

See http://freebeacon.com/ofa-gets-zero-attendance-for-climate-change-rally/

Timing is everything I suppose. Checking the forecast helps too.

OFA’s climate change ‘rally’ has zero environmental impact, zero attendees | Twitchy

To be fair, there were multiple rallies scheduled today, and some did attract tens of people.