War with China? That would actually make the whole $1 trillion Iraq war that led to ISIS look pretty damn good in comparison. Even Donald Trump comes up with more reasonable stuff than this.
Much like with Crimea, Christie hasn't gotten the memo yet that the President of the United States doesn't risk WW3 with fellow superpowers over territorial issues with other countries. If China invades Taiwan or Putin rolls tanks into Poland, things would be different, but we're not nearly there yet.
China's actions in the South China sea have nothing to do with Taiwan. There are islands claimed by 4 other countries. The PRC and ROC will not go after each other there.