Of course there is a plan somewhere for this kind of thing, that's how war works.

But an idiot fringe congressman spouting such things does not make a credible threat or say anything about the actual intentions about the country, just a good way for somebody to get attention or some points from one hardline group or another.

You can say this about any US policy, until it is officially announced. It turns out that the US gov has made all the moves to weaponize Taiwan and make it the center of a war against China, so what is the surprise that they will bomb Taiwan if needed?