Your own failure to track an issue reflects poorly on you, not on the candidate. No matter how much you think it makes for a snide insult to them.
In real life, intelligent people start out wanting something when they hear about it, but after investigating it (say after the treaty is finalized) they may decided that they didn't get what they wanted.
In that case only an arrogant person would refuse to admit they were wrong.
Oh, wait a second - the GOP has in fact chosen an arrogant person that refuses to admit he was wrong. So the fact that you think it is someone how an insult to change your mind about a treaty after it was finalized kind of makes sense.
Go ahead and vote for Trump. You clearly are not capable of seeing his many flaws - and so bamboozled by political rhetoric that you think Hillary's good judgment is some kind of flaw.