finally donned on us
Describes how da realization dat da mussed-up-haired ex-White-House jerk who'd promised to "make America great again" actually ended up doing da opposite was quite late in coming for so many US citizens.
So wif da supposed impending arrest of da egotistical former-prez jerk and self-proclaimed "America's 'trump' card", it's finally donned on us dat perhaps --- just PERHAPS --- said clueless rich bug wasn't such a wonderful knight in shining armor after all.