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About one third of women have experienced physical and/or sexual abuse, so very possibly.

Additionally, voter turnout is horrendous. Only about 1/3 of voting age Americans voted in 2018, 2020 and 2022, so it is mathamatically possible for the ~1/6 of Americans who voted for trump and trump-endorsed candidates to be sexually and/or physically abusive to their partners, and that's before getting into the weeds with ratios male/female trump voters, people who've had multiple partners in that timeframe, people who don't vote consistently, etc.

Oh and only about 30% of American adults identify as Republican, with about 40-50% of American adults identifying as independent, so in short "Trump supporters" are not half of Americans

For the record, I don't actually believe all trump supports are physically and/or sexually abusive to their partners, but given that Trump is a known sexual and physical abuser, I wouldn't be shocked if his base overrepresents physically and sexually abusive partners.