Borrowing from China to oppose China

Romney says his main criterion for spending is to ask " is it so important, so critical, that it is worth borrowing money from China to pay for it?"  Romney also plans to boost spending on the defense spending by $2 trillion beyond what the Pentagon asks for.  Who else might we realistically need more nuclear attack subs to oppose, if not China?  It would be one thing if Romney were proposing spending a shitload on Navy SEAL teams and counter-terrorism technology, but he specifically mentions tanks and Navy vessels, increases of which would only be needed for conflicts with a major enemy like China.