Actually, that's interesting in that 1. they imply that it wasn't a "made in USA" issue and that the problem was just that they were only making the Moto X there and it didn't do well in the market, and 2. "Motorola says that the Moto X smartphone will still continue to be manufactured at plants in China and Brazil." -> if they're still making stuff in Brazil, that implies that it's really not as simple as "can't make anything outside of China".
Tariffs on some electronics can be insane in Brazil - for example "At a time when the [Playstation 4] was selling for $399 in the U.S., an equivalent system was heading to Brazil for $1,899".