Taylor Swift is about the Taylor Swift Brand and in terms of marketing she might be a mini-Trump in the making. Her lips service fine, but destroy her brand by going to the rallye? No freakin’ way, she’s not going to destroy her cash flow by attending that event, she’d destroy half her market...
Most importantly, none of the people who PAY Katy Perry, Madonna, and Ashley Judd to make appearances at political rallies would EVER pay Taylor Swift to do that.
And they don’t work for free!