For those (understandably) asking the (obvious) question "Why should we care of President-Elect-Apparent pisses off the Chinese by talking to the Taiwanese? Well, there's actually a really fucking important reason.
China is the world's second largest economy right now, and they're going to kick our asses pretty soon. They also have the world's largest army, and continue to jocky with India for largest population Everybody needs to give a shit what the Chinese think.
Also, consider this: If the Chinese slap a trade embargo on the US, how fast will our store shelves dry up? I mean, seriously, look around your house and how much shit says "Made in China"? The US can no longer survive without China. Sucks ass, but true.