Obama seemed to do it in a less negative way. The Obama campaign used it to encourage people to get out and vote. The ads run in the Trump campaign seem far more nefarious and suppressive of voting, targeting minority populations and other would be democratic voters. Seems far, far darker than anything Obama did, and in many ways, fairly anti American. So not surprising that people take notice of that kind of stuff.
https://www.bloomberg.com/news/articles/2016-10-27/inside-th...