Sure, maybe. I'm doubtful. But that's irrelevant. He knew when he launched his campaign. He chose to keep it. Worse, there's a good chance his family and his staffers knew as well. This is Jill Biden covering up Joe Biden's dementia all over again, except this time for racism.
Platner is a rubbish candidate. But! There is a case to be made that he's better for America than Susan Collins.