What led Taylor Swift to post her political Instagram message?

What led Taylor Swift to post her political Instagram message?  Washington Post Trump 'likes Taylor Swift 25% less' after political post  BBC News Kim Kardashian's Shocking Reaction To Taylor Swift Breaking Her Political Silence: She's 'Impressed'  Hollywood Life Taylor Swift on Instagram: “I'm writing this post about the upcoming midterm elections on November 6th, in which I'll be ...  Instagram Marsha Blackburn surges to 8-point lead over Phil Bredesen in new CBS poll  The TennesseanFull coverage