[EDIT] wrote "pro-net-neutrality" rather than "anti" by mistake; fixed.
I don't exactly understand why you would vote Republican if you did not like abortions.
And even if it were true (and it's not), the national legislatures is often the opposite party as the executive, and they're the ones that actually make the laws. (The real reality though is that the states are far more relevant in this area.)
[1] https://www.snopes.com/fact-check/abortion-rates-presidencie...
You claimed "fewer abortions happen under Democrat presidents than under Republican presidents", but that's still not really true. Two of the top four years for abortions per live birth (1979, 1980, 1981, 1984) had a Democratic administration. Three if you look at the previous year's President. [1]
[1] According to CDC https://en.wikipedia.org/wiki/Abortion_statistics_in_the_Uni...
That my fellow Dems so often paint this position as plainly stupid or obviously wrong is a frequent source of frustration for me, and why I usually just avoid engaging in discussion of the topic (whoops). Not accusing you of having done that, mind you, I just see it a lot.
I think you've confused abortions with deficits, in terms of things Republicans rhetorically oppose but in practice increase while in office.