To me, this sort of behavior just seems par for the course for how he has been acting since before his presidency. Did you follow his record in business and politics closely prior to voting for him? If so, what mitigating factors were there that let you still feel comfortable in voting for him?
Is this an isolated source of issue with him? Part of a broader trend? In either case, is it/these a big enough deal for him to lose your support moving forward? For the rest of the political party supporting him?
If there has been a shift in your ability to support him, what is it that broke the camel's back?