While Trump clearly saw Taiwan as a bargaining chip to be used in trade negotiations with the Chinese government, the mainstream of the GOP is publicly supportive of defending the island, and the Democrats are, too. Does this mean that America would necessarily come to the aid of Taiwan in the event of a Chinese blockade or attack?
No, because the American public hasn’t been consulted on the matter. It isn’t clear to me that the electorate as a whole would be willing to risk war with a nuclear power for an island thousands of miles from the US mainland. A lot of preparation would have to be done before military action is a politically viable option. As of now, I see no evidence that the leadership of either party is attempting to educate its partisans on this issue.