Why call now? Because campaigns are in overdrive, understaffed, getting loopy from sleep deprivation, and it takes time to process and slot in volunteers. There's still time to make a difference, a huge difference, if you want to get involved. The sooner you call the better.
Note: I didn't use hashtags, party names or troll triggers. (And yet you all still know who I'm talking about!) Keep them out of my mentions.