It depends on the Republican, and Democrat for that matter: a few Republicans are still pro-choice, and I wouldn’t be surprised if the odd Democrat might be anti-choice.
Do what some of the rich do and check out who in each office is running. Don’t vote for Trump. If your state is near-solid red or blue, such as California or Utah, you might as well vote 3rd party if thon is closer to your heart. Check out who’s running for governor, in your House district, Senate (if one is running), mayor, right down to dog catcher. When you’re in the voting booth, you should recognize every name of every candidate: after all, you might have had 2 years to study this.