She's not wrong, and that isn't racist.
She IS wrong, though. The GOP is hardly "all male".
Susan Collins
Susana Martinez
Elaine Chao
Betsy DeVos
Nikki Haley
Cathy McMorris-Rogers
Karen Handel (defeating the mighty Ossoff)
Mary Fallin
Deb Pearce
Joni Ernst
Mia Love
That's just a few I can rattle right off.
I normally think well of Michelle Obama, and it's not a racist statement, but it's not a correct statement as far as the "all male" part goes. These may not be the women you want to see in public offic, but they are prominent GOP women.