We simply do not know.I suspect that despite the two parties differences over feminism and so on, that Republicans in general beat their wives less than Democrats.
This issue is personal for me. About fifteen years ago, I wrote a long story for Mother Jones magazine about a Republican political consultant, married three times, who was alleged by his first two wives to have beaten them. I got the women on the record; I got friends of theirs on the record; I got relatives of theirs on the record. All confirmed the allegations.
Which is a big reason why people believed the story, and why I won the $4 million libel suit that the consultant filed against me and Mother Jones.[Beyond The Missing Men, Shots In The Dark, December 4th, 2014]
However, I wouldn't advise any daughter of mine to marry a political consultant from either party.